Exercise 4.2 1. Express each of the following as rational number with positive denominator: (i) (-15)/(-28) (ii) 6/(-9) (iii) (-28)/(-11) (iv) 19/(- 7) Solution: Rational number with positive denominators: (i) Multiplying the number by -1, we get: -15 – 28 = -15 x -1 – 28 x – 1 = 1528 (ii) Multiplying the […]

### Category: Class 8

## RD Sharma Class 7 Math First Chapter Integers Exercise 1.3 Solution

Exercise 1.3 1. Find the value of 36 ÷ 6 + 3. Solution: 36 ÷ 6 + 3 = 6 + 3 = 9 2. Find the value of 24 + 15 ÷ 3. Solution: 24 + 15 ÷ 3 = 24 + 5 = 29 3. Find the value of 120 – 20 ÷ […]

## RD Sharma Class 8 Math 14th Chapter Compound Interest Exercise 14.5 Solution

Exercise 14.5 1. Ms. Cherian purchases a boat for Rs. 16000. If the total cost of the boat is depreciating at the rate of 5% per annum, calculate its value after 2 years. Solution: Given, Price of boat = Rs. 16000 Depreciation rate = 5% per annum So, 2. The value of a […]

## RD Sharma Class 8 Math 14th Chapter Compound Interest Exercise 14.4 Solution

Exercise 14.4 1. The present population of a town is 28000. If it increases at the rate of 5% per annum, what will be its population after 2 years? Solution: Here, P = Initial population = 28000 R = Rate of growth of population = 5% per annum n = Number of years […]

## RD Sharma Class 8 Math 14th Chapter Compound Interest Exercise 14.3 Solution

Exercise 14.3 1. On what sum will the compound interest at 5% per annum for 2 years compounded annually be Rs 164? Solution: Let the sum be Rs x. We know that: Thus, the required sum is Rs 1600. 2. Find the principal if the interest compounded annually at the rate of 10% for […]

## RD Sharma Class 8 Math 14th Chapter Compound Interest Exercise 14.2 Solution

Exercise 14.2 1. Compute the amount and the compound interest in each of the following by using the formulae when: (i) Principle = Rs 3000, Rate = 5%, Time = 2 years (ii) Principle = Rs 3000, Rate =18%, Time = 2 years (iii) Principle = Rs 5000, Rate = 10 paise per […]

## RD Sharma Class 8 Math 14th Chapter Compound Interest Exercise 14.1 Solution

Exercise 14.1 1. Find the compound interest when principal = Rs 3000, rate = 5% per annum and time = 2 years. Solution: According to the question, Principal amount for the first year = Rs 3,000 i.e., The amount at the end of the second year = Rs 3,150+Rs 157.50= Rs 3307.50 Therefore, […]

## RD Sharma Class 8 Math 13th Chapter Profit, Loss, Discount and Value added Tax (VAT) Exercise 13.3 Solution

Exercise 13.3 1. The list price of a refrigerator is Rs.9700. If a value-added tax of 6% is to be charged on it, how much one has to pay to buy the refrigerator? Solution: List price of the refrigerator = Rs. 9700 VAT = 6% So, VAT = 6% of Rs.9700 = (6/100) […]

## RD Sharma Class 8 Math 13th Chapter Profit, Loss, Discount and Value added Tax (VAT) Exercise 13.2 Solution

Exercise 13.2 1. Find the S.P. (i) P = Rs.13000 and Discount = 10% (ii) M.P = Rs.500 and Discount = 15% Solution: (i) p = Rs. 13000 and Discount = 10% We know that S.P = M.P – Discount S.P = Rs (1300-130) = Rs. 1170 (ii) M.P = Rs. 500 and Discount […]

## Selina Concise Class 8 Math Chapter 21 Surface Area Volume and Capacity Exercise 21E Solution

Selina Concise Class 8 Math Chapter 21 Surface Area Volume and Capacity Exercise 21E Solution Concise Mathematics – Class 8 Selina Exercise 21E Solution by experts | 10C Selina Concise Solution Class 8 | Class 8 Selina Concise Ex 21E Page 244 Solution | RK Bansal Class 8 ICSE Book Solution Online. (1) A cuboid […]