Question

The cost of 15 books is equal to the selling price of 12 books. Find the gain per cent

Answer 1

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Hey mate!

Here is your answer > >

Let the C.P of 1 book be Rs.1

C.P of 12 books =Rs.12

C.P of 15 books=Rs.15

According to question

C.P of 15 books=S.P of 12 books=Rs.15

Now, C.P of 12 books=Rs.12

S.P of 12 books=Rs.15

Gain%=S.P-C.P/C.P×100

= 15-12/12×100

=3/12×100

=25%

Hope it helps!

Thankyou ☆ ☆

Bebrainly

Answer 2

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C. P. Of 15 books = S. P. Of 12 books.
C. P. / S. P. = 12/15

So, S. P. > C. P.
Gain = Rs. (15-12) = Rs. 3

Gain% = {(3/12)×100%}
= 25% [Ans.]


✨✨✨✨ ALWAYS BE BRAINLY ✨✨✨✨