Question

a machine can print 335 copies in 5 minutes. at this rate, how many copies can be printed in one hour?

Answer 1

ans is 4020 copies

$5\text{minutes}=335\text{ copies}$$\begin{gathered} 1\text{ minute}=\frac{335}{5}=67\text{ copies} \\ 1\text{hour}=60\text{ minutes}=60\times67=4020\text{ copies} \end{gathered}$