Question

a shopkeeper earns a profit of 15 percent on selling a radio whereas if it is sold for rupees 360​

Answer 1

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Find the difference in profit:

Difference in profit = 15% - (-15%) = 30%

Difference in profit = Rs 360

Find 1%:

30% = Rs 360

1% = 360 ÷ 30 = Rs 12

Find 100%

1% = Rs 12

100% = 12 x 100 = Rs 1200

Answer: The cost price is Rs 1200