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A man buys cotton at Rs. 2.5/kg with a minimum purchase of 20 kg. If he pays Rs. 80 for some cotton, by how much kilograms did his purchase exceeds the minimum purchase?

A man buys cotton at Rs. 2.5/kg with a minimum purchase of 20 kg. If he pays Rs. 80 for some cotton, by how much kilograms did his purchase exceeds the minimum purchase? Correct Answer 12 kg

Formula Used:

Total Price = Rate × weight purchased

Calculation:

Assume he buys x kilograms of cotton at Rs.2.5/kg

⇒ 2.5x = 80

⇒ x = 80/2.5 = 32

∴ The amount that exceeds the minimum purchase = 32 – 20 = 12 kg

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