Given:
An airplane can cruise at 640 mph.
To find the distance that can be covered in 3/5 of an hour:
In 3/5 of an hour, the distance would be,
[tex]\begin{gathered} 1\text{ hour=640 miles} \\ \frac{3}{5}\text{hour}=640\times\frac{3}{5} \\ =128\times3 \\ =384\text{ miles} \end{gathered}[/tex]Hence, the distance that can be covered in 3/5 of an hour is 384 miles.
