Question

. An article is sold for Rs. 420 with a profit of 5%. What
was its cost price?​

Answer 1

Answer:

Let the cost price be x.

profit%=5%

profit= 5%x

       = 0.5

S.P= Cost Price + Profit

S.P= x + 0.5x

S.P= 1.5x

So, 1.5x=420

     x= 420/1.5

     x= 280 Rs.

Hence the cost price is 280 Rs.

Hope it helps you.

Answer 2

Given - Selling price and profit percentage

Find - Cost price

Solution - Cost price = $\frac{100}{100 + profit\%} selling \: price$

Keep the values in formula to find the cost price

Cost price = $\frac{100}{100 + 5} \times 420$

Performing addition in denominator

Cost Price = $\frac{100 \times 420}{105}$

Now, performing multiplication and division to find the cost price.

Cost price = Rupees 400

Thus, the cost price of article is Rupees 400.