Question

7. A person sells his computer for Rs. 18000 making a profit of 20%. How much did the computer cost him?
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Answer 1

Answer:

Step-by-step explanation:

The selling price of computer = Rs 18000 The profit = 20%                    = 18000×20/100                   = Rs 3600  Therefore actual cost price                       = 18000 - 3600                   = Rs 14400

Answer 2

Answer:

Let original cost be x

So, according to question

x + 20% of x = 1800

x + (20/100) × x = 1800

x + x/5 = 1800

6x/5 = 1800

x = (1800×5)/6

x = 1500

original cost is 1500