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# If 4x + 4 : 9x – 10 is the Triplicate Ratio of 4 : 5, Find X. - ICSE Class 10 - Mathematics

#### Question

If 4x + 4 : 9x – 10 is the triplicate ratio of 4 : 5, find x.

#### Solution

(4x +4)/(9x - 10) = (4)^3/(5)^3

(4x +4)/(9x - 10) = 64/125

500x + 500 = 576x - 640
576x - 500x = 500 + 640

76x = 1140

x = (1140)/76 = 15

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#### APPEARS IN

Selina Solution for Selina ICSE Concise Mathematics for Class 10 (2018-2019) (2017 to Current)
Chapter 7: Ratio and Proportion (Including Properties and Uses)
Ex.7A | Q: 28

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Solution If 4x + 4 : 9x – 10 is the Triplicate Ratio of 4 : 5, Find X. Concept: Ratios.
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