Question

Arnold skydives out of an airplane with a parachute. After he opened his parachute Arnold descended at 70feet per second. An observer on the ground observed that it took Arnold 1 minute and 15 seconds to reach the ground. How far did Arnold descend after his parachute opened?

Answer 1

5,250

Explanation:

Answer 2

Arnold descended a distance of 5,250 ft after his parachute opened

Explanation:

Here in this question, we want to know the distance Arnold descended after his parachute opened.

Mathematically, we know that distance = speed * time

In this case;

The speed is the rate at which he descended = 70 ft per second

Now the time is 1 minute and 15 seconds; since 1 minute is 60 seconds, then 1 minute and 15 seconds is 60 + 15 = 75 seconds

So what we are saying is he descended at a rate of 70 ft per second for 75 seconds

Thus, his distance of descent will be 70 ft per second * 75 seconds = 5,250 ft