Question

a man bought bananas at the rate of 10 for 45 rupees and sold at the rate of one dozen bananas for 51 rupees. find his gain or loss per cent

Answer 1

Solution :-

Cost of 10 bananas = Rs. 45

Cost of 1 banana = 45/10

= Rs. 4.5

Selling price of 12 bananas = Rs. 51

Selling price of 1 banana = 51/12

= Rs. 4.25

Loss = Cost price of 1 banana - Selling price of 1 banana

Loss = 4.5 - 4.25

Loss = Rs. 0.25

Loss percent = (Loss*100)/Cost price

⇒ (0.25*100)/4.5

⇒ 25/4.5

⇒ 5.55%

So, he suffered a loss of 5.55 %.

Answer 2

5.5%  Is the loss %.
cp for 1 banana is 4.5
and sp for 1 banana is 4.25
so loss=cp-sp =.25
so loss%= .25/4.5X 100 = 5.5%