Question

A pilot planning to fly at 420 miles per hour flies against a wind which cuts the speed to 4/5 of the planned speed. How long

will it take the plane to travel 840 miles?

Answer 1

2.5 hours

Explanation:

4/5 of 420 is 336 mph

840 ÷ 336 = 2.5 hours

Answer 2

2.5 hours

Explanation:

420x4/5=336

840/336=2.5