Question : If the selling price is tripled and the cost price is doubled, the profit would be 65%. What is the present profit (in%)?
Option 1: 20
Option 2: 15
Option 3: 25
Option 4: 10
Correct Answer: 10
Solution :
Let the original cost price be Rs. 100
New cost price = 200
New profit% = 65%
New selling price after 65% profit = 200 + 0.65 × 200
= 330
Old selling price = one-third of new selling price
Old selling price = 110
Present profit% = $\frac{SP-CP}{CP}\times 100$
= $\frac{110-100}{100}\times 100$
= 10%
Hence, the correct answer is 10.
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