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प्रश्न
What will be the cost of 3.20 kg of an item, if 3 kg of it costs Rs. 360?
उत्तर
Cost of 3 kg of an item = Rs. 360
Cost of 1 kg of the item = Rs. `360/3`
∴ Cost of 3.20 kg of the item = Rs. `(360 xx 3.20)/3`
= Rs. 384
∴ Cost of 3.20 kg of the item = Rs. 384
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