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If 3x + 4 : X + 5 is the Duplicate Ratio of 8 : 15, Find X. - ICSE Class 10 - Mathematics

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Question

If 3x + 4 : x + 5 is the duplicate ratio of 8 : 15, find x.

Solution

`(3x + 4)/(x + 5) = (8)^2/(15)^2`

⇒ `(3x + 4)/(x + 5) -64 /( 225)`
⇒  675x + 900 = 64x + 320
⇒  611x = -580

⇒  x = - `(580)/(611)`

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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: 26

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Solution If 3x + 4 : X + 5 is the Duplicate Ratio of 8 : 15, Find X. Concept: Ratios.
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