Question:If the side of a square is increased by 5 cm, the area increases by 165 sq. cm. The side of the square is : 

A `13 cm` 
B `14 cm` 
C `15 cm` 
D `12 cm` 

+ Answer
B 

+ Explanation
Let, original side = x cm. Then,

`(x + 5)^2 - x^2`

`= 165 =>10x`

`= 140 or x = 14.`

:. Side of the square` = 14 cm.`

+ Report

Irin Moni

Editor, VCampus

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