Question

1. An electric train is moving with a velocity of 120km/hr. How much distance will it move in

30s?

Answer 1

Given u= 120 km/hr
           t= 30 sec = 1/120 hr 

distance = u × t  
               = 120 × 1/120
               = 1 km 

Answer 2

Hello Nikki 57 !!

As given -

Velocity v , = 120 km/h

we will convert km/h into m/s

= 120×1000/60×60

= 120 × 1000/3600

= 120 × 5 /18
=. 600/18
= 33.33

we know ,

speed = D/ t

s = D/T

33.33 = D / 30

D = 33.3 × 30
D = 1000 m (approx)

That is distance = 1km

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