Question:If `x/5 = y/8`, then `(x + 5) : (y + 8)` is equal to : 

A `3 : 5` 
B `13 : 8` 
C `8 : 5` 
D `5 : 8` 

+ Answer
D 

+ Explanation
Let `x/5 = y/8 = k`.

Then, `x = 5k` and `y = 8k`.

`:. (x + 5)/(y + 8)`

`= (5k + 5)/(8k + 8)`  

`= (5(k + 1))/(8(k + 1)`

`= 5/8`.

+ Report

Md. Habib Ullah

Editor, VCampus

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