Question

a shopkeeper sold an article at a gain of 5percent if he had sold it for 16.50less he would have to loss 5percent find cost price of article do rough work also

Answer 1

Let the cost price of the article be=x

(x+x×5%)- 16.5=x-x×5%
(100x+5x-1650)/100=(100x-5x)/100
105×-1650=95x
105x-95x=1650
10x=1650
x=165