A grocer sells 40 litre oil at the cost of 42 litre of oil.find the gain percentage?
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Answer:
5%
Step-by-step explanation:
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%
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