Question

By weight, $90\%$ of tomato and $78\%$ of potato is water. Find the weight of potato which contains $39kg$ of water. [2 Marks]

Answer 1

Step: Finding the weight of potato which contains $39kg$ of water

Given:

$78\%$ of the total weight of potato $=$ Weight of water in a potato.

Let, total weight of potato be $x$.

Therefore,

$=78\%\times x=39kg$ (0.5 marks)

$=\frac{78}{100}\times x=39$ (0.5 marks)

$=x=\frac{39\times 100}{78}$ (0.5 marks)

$=x=\frac{100}{2}=50kg$ (0.5 marks)

$=x=50kg$

Hence, the weight of potato which contains $39kg$ of water is $50kg$.