Question

On a flight from new york to london, an airplane travels at a constant speed. An equation relating the distance traveled in miles, d, to the number of hours flying, t, is t = 1/500d. How long will it take the airplane to travel 800 miles?

Answer 1

`t=1.6\ hours`

Explanation:

we have

`t=(1)/(500) d`

where

t is the number of hours flying

d is the distance traveled in miles

In this problem we have

`d=800\ miles`

substitute in the equation and solve for t

`t=(1)/(500) (800)`

`t=(8)/(5)\ hours`

`t=1.6\ hours`