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Many cereals are made with high moisture content so that the product can be formed into various shapes before it is dried. A cereal product containing 50% $H_{2} O$ by mass is produced at the rate of 1000 kg/hr. How much water (in kg) must be evaporated per hour if final product contains only 20% water? (Fill your answer dividing it by 62.5)

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answer is 6.

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Detailed Solution

Here,

$\begin{array}{l} \frac{(500 - x)}{(1000 - x)} \times 100 = 20 \\ \Rightarrow x = \frac{1500}{4} \end{array}$

So, water evaporated per hour,

Ans. $= \frac{1500}{4 \times 625}$

= 6

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