Discussion
If selling price is doubled, the profit triples. Find the profit percent.
Answer: B
Cost price be \(Rs. x\) and Selling price be \(Rs. y.\)
Then, \(3(y - x) = (2y - x) \)
\(\Rightarrow y = 2x\)
Profit \(= Rs. (y - x) = Rs. (2x - x) = Rs. x.\)
\(\therefore\) Profit % \(= (\frac{x}{x} \times 100)\) % \(= 100\) %
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