Price of oil increased by 10% so its sale was reduced by 5%. Find the efect on the income of the shopkeeper.

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Solution

Let CP of 1 lit of oil= Rs. 100
On selling 100 lit. shopkeeper gets: RS 10,000
If cost is increased by 10% i.e. CP of 1lit. Of oil = Rs. 110
5% sale decreases i.e. 95 lits. are sold.
So 11095 = RS. 10,450
i.e. a increment of Rs. 450
450100/10000 = 4.5%

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Price of oil increased by 10% so its sale was reduced by 5%. Find the efect on the income of the shopkeeper.

Let CP of 1 lit of oil= Rs. 100 On selling 100 lit. shopkeeper gets: RS 10,000 If cost is increased by 10% i.e. CP of 1lit. Of oil = Rs. 110 5% sale decreases i.e. 95 lits. are sold. So 110*95 = RS. 10,450 i.e. a increment of Rs. 450 450*100/10000 = 4.5%

Let CP of 1 lit of oil= Rs. 100
On selling 100 lit. shopkeeper gets: RS 10,000
If cost is increased by 10% i.e. CP of 1lit. Of oil = Rs. 110
5% sale decreases i.e. 95 lits. are sold.
So 11095 = RS. 10,450
i.e. a increment of Rs. 450
450100/10000 = 4.5%