Question

One dozen of ball cost rupee 18.What is the cost of 720 balls?​

Answer 1

Answer:

• 12 balls= 1 dozen
• 720 balls = 720/12= 60 dozen
• 1 dozen = 18 Rs
• 60 dozen = 60x18= 1080 Rs.

Hope it helps

Answer 2

Let the cost price of a ball be Rs. x.

So, the CP of 17 balls is Rs. 17x.

The CP of 5 balls is Rs. 5x.

 

Since Loss = CP - SP

So, 5x = 17x - 720

On solving, we get

12 x = 720

that is, x = 60

So, the cost price of a ball is Rs. 60.