Question

During takeoff, an airplane goes from 0 to 42 m/s is 5 s.

How far is it going after 4 s. Calculate answer to one decimal

Answer 1

33.6 m

Step-by-step explanation:

In order to solve the distance of the airplane traveled, we have to write each statement in the question:

1. The distance covered by the plane after 5s: 42 m ( This was calculated by getting the difference of the first and second speed recorded)(42 - 0 = 42)

2. Time taken for the plane to reach this speed: 5s

The question asks for:

Distance of the plane after 4s.

We then solve this by saying:

If 42 m are covered in 5s, how many are covered in 4s? or:

42 m = 5s

x m = 4s

We then cross multiply:

42 × 4 = 168 and 5 × (x) = 5x

After that we divide the "x" side on both sides:

168÷5 and 5x ÷ 5

= 33.6 m = x

Since its already rounded to one decimal place already, it remains unchanged.