Question

by selling a table for rupees 990 a trader gain 10% find the cost price of the table

Answer 1

given,sp=990rs
gain%=10%,
we know that c.p=sp×100÷100-10
=990×100/90
so,c.p=1100rs

Answer 2

Let the table cost price be x.

We know that profit = S.P - C.P

                                 = 990 - x

                      profit % = profit/cp * 100

                         10 = 990-x/x * 100

                          10x = 99000 - 100x

                          110x = 99000

                            x = 900.


The cost price of the table is 900.