Question

By selling a wooden table at a loss of 20 per cent , shopkeeper makes a loss of ₹90 find its (1) selling price (2) cost price

Answer 1

Let cost price of table is 100%
he sells table at 20% loss it means he (sells table at 80%.)
now, shopkeeper makes loss of Rs 90, it means this 90 Rs is the value of 20% loss.
means 20% = 90 Rs
if 20% = 90 then
(selling price) 80% = (90/20)×80 = 360 Rs
in the same way
(cost price) 100% = (90/20)/100 = 450Rs
so Selling price = 360Rs
cost price = 450Rs