Question

An airplane traveled 1500 miles in 2 ½ hours. At this rate, how many miles will the airplane travel in 6 hours?

Answer 1

Using a simple ratio would do here:

1500 miles/2.5 hours = x miles/6 hours
x = 6(1500)/2.5 = ....

or

find the rate,
rate = 1500/2.5 mph = 600 mph
so in 6 hours ......