Question

A boy sells a book for Rs 250. He loses 20%. What was the price at which
he bought it?

Answer 1

Answer:

the price will be 230

Step-by-step explanation:

because he loses 20 percent so from 250 we have to minus 20 so the answer will be 230

Answer 2

Answer:

The boy bought the book at Rs. 312.5

Step-by-step explanation:

Selling price (SP) = Rs. 250

Loss % = 20%

Cost Price (CP) = ??

Formula Used ; CP = 100/(100 - L%) × SP

⇒ CP = 100/(100 - 20) × 250

⇒ CP = 100/80 × 250

⇒ CP = 50/4 × 25

⇒ CP = 1250/4

⇒ CP = 312.5

Therefore, the boy bought the book at Rs. 312.5