Question

A man sells a book at a profit of 20%. . If he had brought it at 20% less and sold it for 60rupess less . he could gain 25%. find the cost price​

Answer 1

Let the C.P. be Rs. 100

Then,

Profit = 20%

S.P. = Rs. 120

New C.P. = 20% less = Rs. 80

If he gain is 25% then S.P = Rs.(125/100 x 80)

                                           = Rs.100

Difference in S.P.

= Rs. (120 - 100)

=Rs. 20

If difference in S.P. is Rs. 20, then C.P. = Rs. 100

If difference in S.P. is Rs. 18, then

C.P = R.s (100/20 x 18)

      = R.s 90

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