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Fresh grapes contain 80% while dry grapes contain 10% water. If the weight of dry grapes is 250 kg, what was its total weight when it was fresh?

a) 1000 kg
b) 1125 kg
c) 1225 kg
d) 1100 kg

Answer: b
Explanation: Quantity of water in 250 kg dry grapes,
$$ = \frac{{10}}{{100}} \times 250 = 25\,{\text{kg}}$$
Pulp of grapes = 225 kg
We get 20 kg pulp in 100 kg fresh grapes.
To get 225 kg pulp, we need fresh grapes,
$${\text{ = }}\frac{{100 \times 225}}{{20}} = 1125\,{\text{kg}}$$

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