on selling 9 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) s . 145
B) s . 150
C) s . 155
D) s . 160
E) s . 180
<gadget id="calculator">9 - 5</gadget>
<output>4</output>

<gadget id="calculator">720 / 4</gadget>
<output>180</output>

<result>E</result>
on selling 9 balls at rs. 720, there is a loss equal to the cost price of 5 balls. the cost price of a ball is:
divide(720, subtract(9, 5))
"( c . p . of 9 balls ) - ( s . p . of 9 balls ) = ( c . p . of 5 balls ) c . p . of 4 balls = s . p . of 9 balls = rs . 720 . c . p . of 1 ball = rs . 720 / 4 = rs . 180 . answer : option e"