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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 ₹162The 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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