On selling 17 balls at Rs. 720, there is a loss equal to the cost price of 5 balls. The cost price of a ball is	Answers:
A) 20	B) 30	C) 40	D) 50	E) 60
(C.P. of 17 balls) - (S.P. of 17 balls) = (C.P. of 5 balls)   C.P. of 12 balls = S.P. of 17 balls = Rs.720.   C.P. of 1 ball = Rs.720/12= Rs. 60.   answer :60
<result>E</result>
On selling 17 balls at Rs. 720, there is a loss equal to the cost price of 5 balls. The cost price of a ball is