rohan purchased a small basket full of apples at the rate of 9 for ₹10 and sold them all at the rate of 10 for ₹13. he made a profit of ₹34. find the number of apples
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The gain will be Re 1 and an apple, but that is probably not the intended/expected response.
The percentage gain is what is required in a test of mathematics.
Let us assume that 110 apples were bought and sold.
The cost of 110 apples at 11 for Rs 10 is Rs 100.
The selling price of 110 apples at 10 for Rs 11 is Rs 121.
The profit is Rs 21.
As the cost was Rs 100, it works out to 21%.
☄️Generalisation:
if apples were bought at a for Rs b a S sold at b apples for Rs a, the profit percentage would be (a^2 - b^2)*100/b^2.
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