If 1 kg of iron is ₹20, then what is the price of 7 kg of iron?

₹270

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₹14

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₹90

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₹140

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Solution

The correct option is D ₹140
Price of 1 kg of iron = ₹20
Price of 7 kg of iron = 7 $\times$ Price of 1 kg iron
= ₹7 $\times$ 20
= ₹140

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Shoab sells 1 kg iron for ₹14. What should be his selling price if he wanted to earn extra ₹64 on selling 32 kg of iron?

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