Question

A BOOK SELLER SOLD A BOOK FOR RS.70 AT THE GAIN OF 40%. find the profit

Answer 1

Answer:

20 rs

..... hope it's helpful

Answer 2

Answer :

The profit is Rs.20.

Step-by-step explanation :

Given that :

Sale price of a book =  Rs. 70.

% he got = 40%

Cost price =  ?

Let the cost price be Rs. 100 then sale price will be,

Sale price = 100 + 40 = 140

Cost Price + Profit.

=> 100 + 40 = 140.

We write :

Cost Price = Sale Price.

100          =      140.

x              =      70.

$\sf \implies \dfrac{x}{100} = \dfrac{70}{140}$

x  × 140 = 70 × 100                 (By Cross Multiplication)

x = $\sf \implies \dfrac{70\times 100}{140} = 50.$

Cost Price = Rs. 40.

We know that :

$\bigstar\;\boxed{\sf{Profit = Sale\; Price - Cost\; Price.}}$

Put the values :

=> Rs. 70 - Rs. 50

=> Rs. 20             (Answer)