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Question

The cost of 1 kg of potato is 60. 1 kg of onions costs 10% less than 1 kg of potato. If I pay 180 for potatoes, then what will be the cost of onions? (weight of onions is same as that of the potatoes)

A
₹160
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B
₹162
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C
₹172
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D
₹170
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Solution

The correct option is B ₹162
The cost of 1 kg potato = 60
The cost of 1 kg onion is 10% less than 1 kg of potato.
10100×60=6
60 - 6 =
54
Therefore, cost of 1 kg onion =
54

Weight of potatoes that cost ₹180 = Total costCost of 1kg potatoes
Hence, weight of potatoes
=18060=3 kg

The weight of onions and potatoes are equal.
Cost of 1 kg onion =
54
Therefore, cost of 3kg onions = 3 x 54 = 162.

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