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

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Rs . 45

Rs . 50

Rs . 55

Rs . 60

answer is D.

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Detailed Solution

Given,
Selling price of 17 balls = Rs. 720
Loss equal to the cost price of 5 balls
Suppose
Cost price of the single ball = X
So, the cost price of the 17 balls = 17x
According to the question
Loss = Cost price – Selling price
Loss =

17 x - 720

17 x - 720 = 5 x

{Loss equal to the cost price of 5 balls}

\Rightarrow 12 x = 720

\Rightarrow x = 60

Hence the cost price of the ball

= Rs . 60 .

Correct option is 4.

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