Question

An article is sold at 10% profit. If its cost price and
selling price are less by Rs 5 and Rs 2.50 respectively
and the percentage of profit increases by 5%. Find the
cost​

Answer 1

Let CP be x

SP will be 11x/10

Now from the question

New CP = x-5

New SP = 11x/10 - 2.50 = 11x - 25/10

So

SP/CP = 115/100

11x/10-5/x-5 = 115/100

11x-25/10x-50 = 115/100

1100x - 2500 = 1150x - 5750

50x = 3250

x = 65