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Q.

What is the loss percent on selling 140 lunch boxes at the loss of S.P. of 10 lunch boxes?


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a

6.67%

b

7.67%

c

8.67%

d

9.67% 

answer is A.

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Detailed Solution

It is given that the loss on 140 lunch boxes is equal to the selling price of 10 lunch boxes.
Let the selling price of one lunch box = Rs.10.
Then, the selling price of 10 lunch boxes = Rs.100.
Therefore, loss on 140 lunch boxes = Rs.100.
And, the selling price of 140 lunch boxes is Rs.1400.
We know that,
Loss = Cost price - Selling price  ⇒100=Cost price −1400 ⇒Cost price=Rs.1500   Therefore, the cost price of 140 lunch boxes = Rs.1500.
∵Loss%= Loss Cost price ×100%   ⇒Loss%= 100 1500 ×100     ⇒Loss%=6.67%   Therefore, the loss percent on selling 140 lunch boxes at the loss of S.P. of 10 lunch boxes is equal to 6.67%.
Hence, option (1) is correct.
 
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