Question

man marked the price of a watch as Rs. 400. He sold it allowing a discount of 10% and made a profit of Rs. 40. Find the cost price of the watch.

Answer 1

Answer:

Many people are not reading the question carefully.. The question defines that he had sold the item at a profit of 20 % on the selling price.

The profit will not be the 20% of 400 , But it will be the 20% of selling price which we dont know about.

So let the selling price be 100 and the profit percentage will be 20 (100*20/100).

Now if the selling cost is 100 and rs. 20 are included of profit than the actual cost will be 80rs.

Here, 80 is the cost for 100 selling price

Then the selling price for 400 (80*5 ) will be 500(100*5)

Simply we draw an equation that 80 cp = 100 sp .. Then we have multiplied it with 5 to find the results..

Selling price will be 500.

You can recheck your answer by this-

20% of 500 is 100 . If we subtract 100 from 500 we will get 400 which was our cost price.

Thank you!!

Step-by-step explanation:

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Answer 2

HEYA HERE IS YOUR ANSWER:-

required answer:-

Cost price (CP) = 400

Cost price (CP) = 400SP = CP + Profit = 400+ 20XSP /100

Cost price (CP) = 400SP = CP + Profit = 400+ 20XSP /100400 = SP - 20SP/100 = 80SP/100

Cost price (CP) = 400SP = CP + Profit = 400+ 20XSP /100400 = SP - 20SP/100 = 80SP/100SP = 400X100/80 = 500

Cost price (CP) = 400SP = CP + Profit = 400+ 20XSP /100400 = SP - 20SP/100 = 80SP/100SP = 400X100/80 = 500The selling price is Rs 500