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Aman sells a fan for ₹540 at a 20% profit. He works out CP = 540 − 20% of 540 = ₹432. What is the correct cost price?

Class 8Profit and LossComparing Quantities
  • A₹648
  • B₹432
  • C₹520
  • D₹450

Step-by-Step Solution

The 20% is on CP, not SP. SP = 120% of CP → CP = 540 ÷ 1.2 = ₹450. Check: 20% of 450 = 90 and 450 + 90 = 540.
Answer: D) ₹450

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