Question

please solve it fast

Answer 1

Cost price of 40balls = 40  x 50 = 2000

Selling price to get 40% profit for 40 balls = 2000 x 140/100 = 2800

Selling price of 30 balls = 30 x 60 = 1800

Selling price should be for remaining 10 balls to get 40% = 2800 - 1800 = 1000

So selling price for one ball = 1000/10 = Rs100

Answer 2

Cost price of  40  balls = 40 × 50= Rs.  2000

To gain  40 %  in the whole transaction, selling price of  40  balls = 2000× 140 /100= Rs.  2800

Selling price of  30  balls  = 30 × 60 = Rs.  1800

Therefore, price at which he should sell each of the the remaining ball = 2800 − 1800 /10 = Rs.  100

thanks..hope it helps