# FRANK Solutions for Class 9 Maths Chapter 6 - Changing the subject of a formula

Revise chapter-based problems and solutions with Frank Solutions for ICSE Class 9 Mathematics Chapter 6 Changing the subject of a formula. Practise the answers for textbook problems to learn how to use a formula to calculate answers. Understand how to use a formula to express a relation given in the questions.

Learn to express given data in the form of a formula using variables with Frank textbook solutions. To quickly revisit the chapter concepts, explore our ICSE Class 9 Maths video lessons. For boosting your exam confidence, solve the variety of problems in our sample question papers.

## Chapter 6 - Framing of Formulae Exercise Ex. 6.1

The simple interest on a sum of money is the product of the sum of money, the number of years and the rate percentage. Write the formula to find the simple interest on Rs A for T years at R% per annum.

The fahrenheit temperature, F is 32 more than nine -fifths of the centigrade temperature C. Express this relation by a formula.

The arithmetic mean M of the five numbers a, b, c, d, e is equal to their sum divided by the number of quantities. Express it as a formula.

Make a formula for the statement :"The reciprocal of focal length f is equal to the sum of reciprocals of the object distance u and the image distance v."

Make a formula for the statement:"The number of diagonals, d, that can be drawn from one vertex of an n sided polygon to all the other vertices is equal to the number of sides of the polygon less 3"

A man bought 25a articles at 30p paisa each and sold them at 20q paisa each. Find his profit in rupees.

How many minutes are there in x hours, y minutes and z seconds.

Apple cost x rupees per dozen and mangoes cost y rupees per score. Write a formula to find the total cost C in rupees of 20 apples and 30 mangoes.

## Chapter 6 - Framing of Formulae Exercise Ex. 6.2

Given: mx + ny = p and y = ax + b. Find x in terms of m, n, p, a and b.

If A = pr^{2}
and C = 2pr,
then express r in terms of A and C.

If V = pr^{2}h
and S = 2pr^{2}
+ 2prh, then express V in terms of S, p
and r.

If 3ax + 2b^{2} = 3bx + 2a^{2}, then
express x in terms of a and b. Also, express the
result in the simplest form.

## Chapter 6 - Changing the subject of a formula Exercise Ex. 6.3

The pressure P and volume V of a gas are connected by the formula PV = C; where C is a constant.

The total energy E possess by a body of Mass 'm', moving with a velocity 'v' at a height 'h' is given by:

Make 'm' the subject of formula.

The total energy E possess by a body of Mass 'm', moving with a velocity 'v' at a height 'h' is given by:

Find m, if v = 2, g = 10, h = 5 and E = 104.

### Kindly Sign up for a personalised experience

- Ask Study Doubts
- Sample Papers
- Past Year Papers
- Textbook Solutions

#### Sign Up

#### Verify mobile number

Enter the OTP sent to your number

Change