Question

An airplane is traveling at a speed of 200 km/h. Compute the speed of the airplane in m/s.

A) 3.3 m/s
B) 33.3 m/s
C) 55.6 m/s
D) 111.20 m/s

Answer 1

Answer: C) 55.6 m/s

Step-by-step explanation: 200km/1hr x 1000m/1km x 1hr/60min x 1min/60s = 55.6 m/s

If the conversion factors are properly set up and all numbers are correct, the unwanted units cancel out leaving the units of the final answer.

Answer 2

Given the speed is 200 km /hr

use 1 km = 1000 meter

1 hr = 3600 seconds

so

`200 km/hr = (200*1000)/(1*3600)   m/s`

simplifies to

`(5000)/(9) m/s`

`55.6 m/s`

so option C