Wbbse math solution class 10

1. A taxi from Bipin’s uncle travels a 14 km path in 25 minutes. Let us calculate by applying the theory of variation how many paths he will go in 5 hours by driving a taxi at the same speed. Solution: Let required time = T & required distance = S. When time increases, distance increases when speed is constant. ∴a+b α a-b Proved. 2. If x³+ y³ α x³-y³, let us prove that x + y α x-y. Solution: x³+ y³ α x³- y³ ∴ x³+ y³ = K(x³-ya) (where K is a Constant) X³+y³ / x³-y³ = K/1 x³ +y³ +x³-y³ / x³+y³-x³+y³ = K+1 / K-1 or, 2x³/ 2y³ = K+1/K-1 or, x³+y³ = K+1 / K-1 x+y = 3 √K+1 / 3√k-1 R (let) (Where Ris Constant) ∴ (x+y) α (x-y) Proved. Question 8. If 15 farmers can cultivate 18 bighas of land in 5 days, let us determine by using the theory of variation the number of days required by 10 farmers to cultivate 12 bighas of land. Solution: No. of farmers A, no. of days = B & area of land = C No. of days is in inverse variation with no. of farmers when area of land remains constant i.e., B α 1/A when C is constant Again, No. of days is an indirect variation with an area of land, when No. of farmers remains constant ∴ B α C when A is Constant. According to the theorem on joint variation, Β α C/A when C & A both vary ∴ B = K C/A where K is a constant of variation. Given A = 15, B = 5, & C = 18. 5 = K 18/15 or, K = 15 x 5 / 18 = 25/6 B = K C/A =25/6 x 12/10 =5 ∴ No. of days 5. Ans. Question 9. The volume of a sphere varies directly with the cube of its radius. Three solid spheres having leng...

West Bengal Madhyamik Board Question Paper for Class 10th Maths 2020 In PDF WBBSE Madhyamik 10th Class Question Paper Mathematics English Version 2020 with Solutions – Free Download West Bengal Madhyamik (Class 10) Maths 2020 question paper with solutions are provided on this page by BYJU’S, in downloadable pdf format and also in the text, so that the students can solve the WBBSE Madhyamik maths question paper 2020 for better preparation of the West Bengal Madhyamik exam. Students can refer to the West Bengal Madhyamik (Class 10) Maths 2020 question paper to gauge their exam preparation level. Maths Question Paper 2020 Class 10 is also added here, which assists in the exam preparation within the stipulated time. Students are able to access all the WBBSE Class 10th Maths Question Paper With Solutions 2020 Question 1: Choose the correct option in each case from the following questions : [1 x 6 = 6] [i] If a principal becomes twice of it in 10 years, then the rate of simple interest per annum is: (a) 5% (b) 10% (c) 15% (d) 20% Answer: (b) Principal – x Time – 10 year Simple interest – 2x According to the formula, R= SI * 100 / 10 * 2x R = 2x * 100 / 10 * x R = 10% [ii] The product of two roots of the equation x 2– 7x + 3 = 0 is: (a) 7 (b) -7 (c) 3 (d) -3 Answer: (c) x 2– 7x + 3 = 0 Roots are 7 + √(37) / 2 and 7 – √(37) / 2 Product = 7 2– (√37) 2 / 4 ( a + b × a – b = a 2– b 2 ) = 49 – 37 / 4 = 12 / 4 = 3 [iii] The length of two chords AB and CD of a circle of centre ...

সমাধানঃ \(x^2:\frac^2\times y^2\times z^2\) = \(xyz:(xyz)^2\) = 1:xyz সমাধানঃ A:B=2:3, B:C=4:5 এবং C:D=6:7 \(\frac\) ∴ A:D=16:35 4. (iii)যদি A:B=3:4 এবং B:C=2:3 হয়, তাহলে A:B:C নির্ণয় করি। সমাধানঃ (7x-5y):(3x+4y)=7:11 বা,\(\frac\) ∴ (3x-2y):(3x+4y)=137:473 [প্রমাণিত] সমাধানঃ (10x+3y):(5x+2y)=9:5 বা, \(\frac\)

Let Us Work Out 1.1 Question 1. I write the quadratic polynomials from the following polynomials by understanding it. i. x 2 – 7x + 2 ii. 7x 5 – x(x + 2) iii. 2x (x+5) + 1 iv. 2x – 1 Answer: (i) The given equation is x 2 – 7x + 2 This equation is of the form ax 2 + bx + c = 0 where a,b,c are real numbers as a = 1 which is not equal to 0,b = -7 and c = 2. Hence, this equation is a quadratic equation. (ii) The given equation is 7x 5 – x(x + 2) This equation is not of the form ax 2 + bx + c = 0 where a,b,c are real numbers as the highest degree of x in the equation is 5. Hence, this equation is not a quadratic equation. (iii) The given equation is 2x (x+5) + 1 Therefore, this equation is of the form ax 2 + bx + c = 0 where a,b,c are real numbers as a = 2 which is not equal to 0,b = 10 and c = 1. Also the highest degree of x in the equation is 2. Hence, this equation is a quadratic equation. (iv) The given equation is 2x-1 This is a linear equation with highest degree of x is 1. This is of the form ax 2 + bx + c = 0 where a,b,c are real numbers but here a = 0 which does not satisfy the condition of quadratic equations. Hence, this equation is not a quadratic equation. Question 2. Which of the following equations can be written in the form of ax 2 + bx + c = 0, where a, b, c are real numbers and a ≠ 0, let us write it. i. ii. iii. iv. (x - 2) 2 = x 2 – 4x + 4 Answer: (i) The given equation is It can be written as Therefore, this equation is of the form where a,b,c are real numb...

Hello Readers, WBBSE Class X Ganit Prakash Book PDF download free. Are you looking for WBBSE Class X Maths book pdf? then, it is the best place for you. Most of the WBBSE students search for WBBSE Mathematics book pdf. Here you can freely download WBBSE Class X Maths Book PDF. WBBSE e-textbooks are very important for any kind of competitive exam that happen in West Bengal. These books are best practices for SSC, Railway, WBPS, RRB, Police, PSC, UPSC, RRC, or any kind of competitive exam. It can be a reason to pass those exams. Most of the students are looking for these books in pdf/e-book format, but today we are sharing WBBSE Class X Ganit Prakash Book PDF. You must carefully practice these books on a daily basis for better results in competitive exams. These Mathematics books are very important for your daily exercise. From here you can download very easily with google drive links and most importantly it is absolutely free. Books details, book previews, and download links are given below. If any download link is/are broken or not working or invalid just comment down below, we will fix that as soon as possible. Also Check: WBBSE Class V To Class X Mathematics Book PDF Download So download the every WBBSE Class X Maths Book PDF as soon as possible. We will update the books when it has a new update. We hope this post is very useful for you. If you have any problem feel free to comment below and we will reply as soon as possible. Details Of WBBSE Class 10 Math Book Language:...

Application 1. At present, 4000 students have been taking training from this train- ing centre. In the last 2 years, it has been decided that the facility to get a chance for a training programme in this centre will be increased by 5% in comparison to its previous year. Let us see by calculating how many students will get a chance to join this training programme at the end of 2 years. Solution: After 2 years the total number of candidates = 4000 x (1+ 5 / 100)

At Vedantu, we believe that the more you practice, the better you perform in the exams. That’s why we have provided West Bengal Board (WBBSE) Maths Class 10 Previous Year Paper 2019 PDF here so that you become thorough with the question paper pattern. Practicing West Bengal Board Class 10 Maths previous year question papers has many advantages. One of the most important factors these papers address is the management of time. We have seen that many students would have studied hard and learnt the concepts well, but still struggle to finish answering the paper. Solving Maths previous question papers for class 10 familiarizes the student with the format of the paper beforehand. Students who struggle to finish on time are advised to start solving these papers at the earliest so that they don’t lag behind. Our highly qualified teachers have curated these West Bengal Board Class 10 Maths past years question paper and have developed a set of sample papers in PDF format that are available for free download. West Bengal Board Class 10 Maths Previous Year Question Paper 2019 with Solutions will be uploaded soon on this page.