Expenditure of a family on 3 times are in the ratio of 2:5:3. The prices of these commodities rise by 30 per cent, 20 per cent and 40 per cent respectively. By what per cent has total expenditure increased?

Expenditure of a family on 3 times are in the ratio of 2:5:3. The prices of these commodities rise by 30 per cent, 20 per cent and 40 per cent respectively. By what per cent has total expenditure increased?

College Algebra

10th Edition

ISBN:9781337282291

Author:Ron Larson

Publisher:Ron Larson

Chapter3: Polynomial Functions

Section3.5: Mathematical Modeling And Variation

Problem 7ECP: The kinetic energy E of an object varies jointly with the object’s mass m and the square of the...

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Question

Expenditure of a family on 3 times are
in the ratio of 2:5:3.
The prices of these commodities rise by
30 per cent,
20 per cent and 40 per cent
respectively.
By what per cent has total expenditure
increased?

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