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

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7.Profit and Loss

medium

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

A

$45$

B

$50$

C

$55$

D

$60$

Solution

Let, the $C.P.$ of a ball be $₹x.$

$\therefore$ $S.P.$ of $17$ balls $=₹ 720$

Now, according to the question,

$17 x-720=5 x$

$\Rightarrow 12 x=720 \Leftrightarrow x=Rs. 60$

Standard 13

Quantitative Aptitude

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