Question

by selling an article for rupees 900 a person lost 10% find the CP of article

Answer 1

let the cost price of the article be ' x '

since the person lost 10% on cost price

then find the loss :

loss = 10 % of c.p = 10 % of x = 0.1 x

since,the selling price of article=Rs 900

then , solve for ' x '

x - 0.1 x = 900

x ( 1 - 0.1 ) = 900

0.9 x = 900 ==> x = Rs 1000

therefore ,

the cost price of the article was Rs 1000.

Answer : cost price = Rs 1000

Answer 2

s.p= 900
lost%= 10%

c.p=s.p×(100-lost%)/s.p
=900×(100-10)/900
=900×90/900=90