A dairyman pays Rs.6.40 per litre o milk. He adds water and sells the mixture at Rs.8 per litre, thereby making 37.5% profit. The proportion of water to milk received by the customers is:
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Profit made by dairy man is = Rs 37.5 * 6.40 /100 = Rs 2.40 per litre cost of water is zero - assumption.
One litre of pure milk + x litres of water is sold at Rs 6.40 + Rs 2.40 = Rs 8.80 that is, 1+x litres of the mixture is fetching him Rs 8.80.
Then, one litre of mixture is sold at Rs 8.80 / (1+x) = Rs 8
8.80 = 8 + x * 8 x = 0.80/8 = 0.10 So dairyman adds 100 ml of water to 1 litre of milk to get 1.1 litres of the mixture.
in one litre of the mixture, we have 100/1.1 ml of water and 1000/1.1 ml of milk.
ratio will be 100: 1000 => 1 : 10
One litre of pure milk + x litres of water is sold at Rs 6.40 + Rs 2.40 = Rs 8.80 that is, 1+x litres of the mixture is fetching him Rs 8.80.
Then, one litre of mixture is sold at Rs 8.80 / (1+x) = Rs 8
8.80 = 8 + x * 8 x = 0.80/8 = 0.10 So dairyman adds 100 ml of water to 1 litre of milk to get 1.1 litres of the mixture.
in one litre of the mixture, we have 100/1.1 ml of water and 1000/1.1 ml of milk.
ratio will be 100: 1000 => 1 : 10
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