Question

A flask was sold at rs 72 incurring a loss of 10%. what was its cost price?

Answer 1

S.P =₹72
Loss=10%

C.P= S.P×100÷100-10
=72×100÷90
=₹80 ans

Answer 2

sp=72
loss%=10%
let cp be x
now,
sp=cp-loss%of cp
or,72=x-10/100 * x
or,72=(100x-10x)/100
or,7200=90x
or,x=80
so cp=rs80