Subject :IMO Class : Class 8
A man bought apples at the rate of 8 for Rs 34 and sold them at the rate of 12 for Rs 57. How many apples should be sold to earn a net profit of Rs 45?
(A) 90
(B) 100
(C) 135
(D) 150
Ans 1:
Class : Class 9
c.p of each apple = 34/8 = 4.25
s.p of each apple = 57/12 = 4.75
profit per apple = 4.75-4.25 = 0.5
net profit = no of apple sold * profit on each apple
45 = no of apple sold *0.5
45/0.5 = 45*2 = 90 = no of apple sold
thus the answer is (A) 90 apples