Question

If 25 horses consume 18 quintal in 36 days, how long will 28 quintal last for 30 horses?

Answer 1

25 horses consume 18 quintal in = 36 days
1 horse consume 1 quintal in $=\frac{36\times 25}{18}$ days
30 horses consume 28 quintal in $=\frac{36\times 25\times 28}{18\times 30}$ days
$=\frac{2\times 5\times 28}{6}=\frac{140}{3}=46\frac{2}{3}$ days.