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MCQ

Fresh grapes contain 90% water by weight while dried grapes contain 20% water by weight. What is the weight of dry grapes available from 20 kg of fresh grapes?

#### Options

2 kg

2.4 kg

2.5 kg

2.6 kg

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#### Solution

**2.5 kg**

**Explanation :**

Weight of fresh grapes = 20kg

Quantity of water in it = 90% of 20

= `90/100xx20` = 18kg

Quantity of pulp in it = (20 -18) = 2 kg

Let weight of dry grapes = y kg

Then, quantity of water in it = 20% of y

= `200/100xx "y"=1/5 "y"`

Quantity of pulp in it = `"y" -1/5"y" =4/5"y"`

∴ `4/5"y" =2 ⇒ "y" = (2xx5)/4=` 2.5kg

Concept: Percentage, Discount and Partnership (Entrance Exam)

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