Question

A grocer sells 40 l of oil for the cost price of 42 l, find his gain percent

Answer 1

Answer:

A grocer sells 40 l of oil for the cost price of 42 l. What is his gain percent?

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Solution,

Let S.P. of 40 l of oil be Rs. a

S.P. of 1 l of oil =Rs.a/40

According to qn,

C.P. of 42 l of oil=S.P. of 40 l of oil=Rs.a

C.P. of 1 l of oil=Rs.a/42

Since,S.P. of 1 l of oil>C.P. of 1 l of oil,there is profit.

Now,

Profit%={(S.P.-C.P.)100}/C.P.

={(a/40-a/42)100}a/42

=[{(21a-20a)/840}100]a/42

={10a/84}a/42

=(10a x 42)/84a

=5%

So,the gain percent or profit percent is 5%.