Question

A man sells a book at a profit of 20%. If he had bought it at 20% less and sold it for 360
less, he would have gained 25%. Find the cost price of the book.
IXED BAG... A Revision Exercise
If the sum of 60% and 30% of a number is 783.​

Answer 1

Answer:

50

Step-by-step explanation:

What would you like to ask?

8th

Maths

Comparing Quantities

Prices Related to Buying and Selling

A man sells a book at a pro...

MATHS

A man sells a book at a profit of 25%. If he had bought it at 20% less and sold it for Rs. 10.50 less, he would have gained 30%. The cost price of the book is

MEDIUM

Share

Study later

ANSWER

Let C.P.be 100.

Gain =25%

S.P. =100+25% of 100=125

Suppose C.P. =80

Gain =30%

S.P. =

100

130×80

=104

Difference =125−104=21

Now comparing difference

21 on 100

1 on

21

100

So, 10.50 on =

21

10.50×100

=50

So, required C.P. = Rs. 50.

Answer 2

Step-by-step explanation:

Let C.P.be 100.

Gain =25%

S.P. =100+25% of 100=125

Suppose C.P. =80

Gain =30%

S.P. =100130×80=104

Difference =125−104=21

Now comparing difference

21 on 100

1 on 21100

So, 10.50 on =2110.50×100=50

So, required C.P. = Rs. 50.