A milkman buys some milk If he sells it at rupees 10 a litre he losses 800 rupees but when he sells ...........

Quant (SSC) Profit and loss

A milkman buys some milk. If he sells it at rupees 10 a litre, he losses 800 rupees but when he sells it at 12 a litre, he gains 600 rupees. How much milk did he purchase ?

200 litre

350 litre

500 litre

700 litre

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Explanation:

Let he buys x litres of milk and cost price = c and selling price = s
x*c – x*10 = 800 and x*12 – x*c = 600
add both equation, we get, 2*x = 1400,
so x = 700 litres