Question

A shopkeeper bought 30 cricket balls at the rate of ₹40 per ball. He sold 20 balls at the rate of ₹50 per ball. At what rate should he sell the remaining balls to have a profit of 40% in the whole transaction?
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Answer 1

Step-by-step explanation:

Price of 30 balls bought = 30x40=1200

price of 20 balls sold = 20x50 =1000

total price needed to attain 40% profit =1200x140/100=1680

balance price needed to sold= 1680-1000

= 680

price of each remaining ball= 680/10=68

Answer 2

Answer:

the rate is =28

Step-by-step explanation:

brought cost = 30 ×40 =1200

cost of 20 balls sell=20×50=1000

cost of 10 ball = 10× x

according to the question

$40 = \frac{1000 + 10x - 1200}{1200} \times 100 \\ 40 = \frac{200 + 10x}{12 } \\ 480 = 200 + 10x \\ 280 = 10x \\ 28 = x$

then 10 balls should sell at rupee= 28