Question

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. Rs. $45$
• B. Rs. $50$
• C. Rs. $60$
• D. Rs. $55$

Answer 1

Answer: (C)

Rs. $60$

$\Rightarrow$ Let the cost price of a ball is $Rs.x$

$\Rightarrow$ Given, on selling 17 balls at $Rs.720$, there is a loss equal to the cost price of 5 balls.

$\Rightarrow$ The equation is $17x-720=5x$

$\Rightarrow$ Solving the equation we get $x=60$

$\therefore$ Cost price of a ball is $Rs.60.$