Question

an electric engine has a velocity of 120km/h. how much distance will it travel in 30 seconds?

Answer 1

Velocity v = 120 km/h
Time t = 30 s
Let Distance be d

First, we need to convert 120 km/h into m/s

1 km/h = (1000m)/(3600 s) = 5/18 m/s
So, 120 km/h = 120×5/18 m/s
So, v = 200/6 m/s

Now, velocity = distance/time

So d = v×t
So, d = (200/6) × 30
So, d = 1000 m
So, d = 1 km

Thus, distance travelled is 1 km

Answer 2

velocity =  120km/h

= 120 x 5/18

= 33.33 m/s
time = 30 seconds  

velocity = distance/ time

distance = velocity x time

33.33 x 30 

999.9 meters

approximately 1 km