Question

Three truck drivers, Amar, Akbar and Anthony stop at a road side eating joint. Amar orders 10 rotis, 4 plates of tadka, and a cup of tea. Akbar orders 7 rotis, 3 plates of tadka, and a cup of tea. Amar pays 80 for the meal and Akbar pays 60. Meanwhile, Anthony orders 5 rotis, 5 plates of tadka and 5 cups of tea. How much (in rupees) will Anthony pay?

Accepted Answer

D. Let prices of roti, tadka, tea be $r, t, c$. 1) $10r + 4t + c = 80$ 2) $7r + 3t + c = 60$ We need $5(r + t + c)$. Multiply (1) by 2: $20r + 8t + 2c = 160$. Multiply (2) by 3: $21r + 9t + 3c = 180$. Subtract: $(21r + 9t + 3c) - (20r + 8t + 2c) = 180 - 160 \implies r + t + c = 20$. Therefore, Anthony pays $5(r + t + c) = 5 	imes 20 = 100$.

Amar, Akbar, Anthony Bill

Explanation

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