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If A: B = 4: 7, Find the Following: - ICSE Class 10 - Mathematics

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Question

If a: b = 4: 7, find the following: 

`(5"a" + 2"b")/(5"a" - 2"b")`

Solution

a : b = 4 : 7 ⇒ `"a"/"b" = 4/7`

`(5"a" + 2"b")/(5"a" - 2"b") = (5 "a"/"b" + 2)/(5 "a"/"b" - 2)`

= `(5 xx 4/7 + 2)/(5 xx 4/7 - 2)`

= `(20/7 + 2)/(20/7 - 2)`

= `34/6`

= `17/3`

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APPEARS IN

 Frank Solution for Frank Class 10 Mathematics Part 2 (2016 to Current)
Chapter 9: Ratio and Proportion
Exercise 9.1 | Q: 2.1

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Solution If A: B = 4: 7, Find the Following: Concept: Ratio and Proportion Example.
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