By selling a pen for Tk. 39, the gain is as much percent as its cost. What is the cost?

By selling a pen for Tk. 39, the gain is as much percent as its cost. What is the cost?

A 30

B 20

C 40

D 27

Solution

Correct Answer: Option A

if , cost X tk then, x+(x X x/100)= 39 or, x=39