Question

The difference between selling an article at 6% profit and at 9% profit is Rs.9. Find the sum of the two selling prices.

Answer 1

Difference between profit percent=$9-6=3$%
Thus 3% of CP =9
$C.P.=\frac{9\times 100}{3}=300Rs.$
$S.P=\frac{100+gain}{100}\times C.P.$
When gain 6% then $S.P=\frac{106}{100}\times 300=318Rs.$

When gain 9% then $S.P.=\frac{109}{100}\times 300=327Rs.$
Hence C.P=300 and Two S.P. are 318 Rs and 327 Rs.