Fresh fruit contains 68\% water and dry fruit contains 20\% water. How much dry fruit can be obtained from 100 kg of fresh fruits?
(a)32 kg
(b)40 kg
(c)52 kg
(d)80 kg
Answer
Answer (as printed): B
Explanation
Quantity of pulp in 100 kg of fresh fruits = (100-68)\% of 100 kg = 32 kg. Let the quantity of dry fruit obtained be $x \mathrm{kg}$. Then, $(100-20) \%$ of $x=32$ $$\Leftrightarrow \frac{80}{100} x=32 \Leftrightarrow x=\left(\frac{32 \times 100}{80}\right)=40 .$$