# 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.

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

Question 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.

Solution 1 Question 2 Solution 2 Question 3

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

Solution 3 Question 4

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.

Solution 4 Question 5

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."

Solution 5 Question 6

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"

Solution 6 Question 7 Solution 7 Question 8

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

Solution 8 Question 9

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

Solution 9 Question 10

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.

Solution 10 ## Chapter 6 - Framing of Formulae Exercise Ex. 6.2

Question 1 Solution 1 Question 2 Solution 2 Question 3 Solution 3 Question 4 Solution 4 Question 5 Solution 5 Question 6 Solution 6 Question 7 Solution 7 Question 8 Solution 8 Question 9 Solution 9 Question 10 Solution 10 Question 11 Solution 11 Question 12 Solution 12 Question 13 Solution 13 Question 14 Solution 14 Question 15 Solution 15 Question 16

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

Solution 16 Question 17

If A =  pr2 and C = 2pr, then express r in terms of A and C.

Solution 17 Question 18

If V = pr2h and S = 2pr2 + 2prh, then express V in terms of S, p and r.

Solution 18 Question 19

If 3ax + 2b2 = 3bx + 2a2, then express x in terms of a and b. Also, express the result in the simplest form.

Solution 19 Question 20 Solution 20 ## Chapter 6 - Changing the subject of a formula Exercise Ex. 6.3

Question 1 Solution 1 Question 2 Solution 2 Question 3 Solution 3 Question 4 Solution 4 Question 5 Solution 5 Question 6 Solution 6 Question 7 Solution 7 Question 8 Solution 8 Question 9 Solution 9 Question 10 Solution 10 Question 11 Solution 11 Question 12 Solution 12 Question 13 Solution 13 Question 14 Solution 14 Question 15 Solution 15 Question 16 Solution 16 Question 17

The pressure P and volume V of a gas are connected by the formula PV = C; where C is a constant. Solution 17 Question 18(a)

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.

Solution 18(a) Question 18(b)

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.

Solution 18(b) Question 19 Solution 19 Question 20 Solution 20 ### STUDY RESOURCES

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