On selling 17 balls at Tk. 720, there is a loss equal to the cost price of 5 balls. The cost price of a ball is:

On selling 17 balls at Tk. 720, there is a loss equal to the cost price of 5 balls. The cost price of a ball is:

A Tk. 45

B Tk. 50

C Tk. 55

D Tk. 60

Solution

Correct Answer: Option D

Let, Cost price be x

Then, A/Q

17x - 720 = 5x

or, 17x - 5x = 720

or, 12x = 720

or, x = 720/12

or, x = 60