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Men & Food MCQ1(Days. food, men)

Men & Food MCQ1 : 18 men can eat 20 kg of rice in 3 days. How long will 6 men take to eat 40 kg of rice?

a) 20            b) 18               c) 32           d) 20

Solution:

This is a problem of compound proportion!

We generaly know that if number of men increases then food will be for less days i-e if men increases then days and food stock both decreases!

 

We arrange data as under:

 

drawit diagram

 

we write it as;

\[ \frac{3}{x}=\frac{6}{18}\times \frac{20}{40} \]

\[ x= \frac{18\times 40\times 3}{6\times 20}= 19 \]

 

 

So, they can eat it upto 18 days ———— option b is correct

 

 

 

 

 

 

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