Question

The stcok of grain in a government warehouse lasts $30$ days for $4000$ people. How many days will it last for $6000$ people ?

Answer 1

for $4000$ people grain will last $30$ days

for $1$ people grain will last $(30\times 4000)$ days

for $6000$ people grain will last $\left(\frac{30\times 4000}{6000}\right)$

$=20$ days