Question

A shopkeeper gains 25%by selling ties at rs155a piece.how much profit will she make by selling 200 of them?

Answer 1

Hope u like my process
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=> Let the cost price of a tie be Rs x

=> Selling price = Rs 155

=> profit on 1 tie = Rs (155 - x)

By problem.
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$= > \frac{155 - x}{x} \times 100 = 25 \\ \\ or. \: \: 155 - x = 0.25x \\ \\ or. \: \: 1.25x = 155 \\ \\ or. \: \: \bf \: x = \frac{155}{1.25} = 124$

So, Profit on 1 tie = Rs (155 - 124) = Rs 31

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So

Profit on selling 200 ties = Rs (31×200)

= Rs 6200

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Hope this is ur required answer

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