Question

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

Answer 1

Given the speed is 200 km /hr

use 1 km  = 1000 meter

1 hr = 3600 seconds

so

$200 km/hr = \frac{200*1000}{1*3600} m/s$

simplifies to

$\frac{5000}{9} m/s$

$55.6 m/s$

so option C

Answer 2

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.