Question

An airplane files with a constant speed of 680 km/h. How far can it travel in 2 1/4 hours?

Answer 1

$\frac{distance}{hour} =\frac{680km}{1 hour} = \frac{x}{2\frac{1}{4}}\\ \frac{680}{1} = \frac{x}{2\frac{1}{4}}\\ 680*2\frac{1}{4}=1*x\\ 1530=x$

The plane can travel 1530km in $2 \frac{1}{4}$hours.