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By selling a ball for Rs. 39, a shopkeeper gains 30%. At what price should he sell it to gain 40%? |
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Answer» -Shopkeeper gains 30% by selling a ball for 39 Rs.TO FIND :-The selling price at which he would GAIN 40%.SOLUTION :-Let the cost of ball be 'x'.The shopkeeper sold the ball at 39Rs with 30% PROFIT .→ x + [30% of x] = 39→ x + (30x/100) = 39→ x + (3x/10) = 39→ 13x/10 = 39→ 13x = 390→ x = 30 RsHence , cost of ball is 30Rs.We have to find the selling price if the shopkeeper gained 40%.Selling price = 30 [40% of 30]Selling price = 30 + [(40/100)30]Selling price = 30 + 12Selling price = 42RsHence , shopkeeper should sell the ball at 42RS to gain 40% . |
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