Question

If 10 horses consume 18 bushels in 36 days. How long will 24 bushels last for 30 horses?

Answer 1

10 horses consume 18 bushels in = 36 days
1 horse consumes 18 bushels in $=36\times 10$ days
= 360 days
30 horses consume 18 bushels in $=\frac{360}{30}$ days
= 12 days
30 horses consume 1 bushel in $=\frac{12}{18}$ days
30 horses consume 24 bushels in $=\frac{12}{8}\times 24$ days
$=\frac{2}{3}\times 24$ days
= 16 days