Question

an electric train is moving with a velocity of 30 M per second how much distance will it travel in 30 second

Answer 1

As we know, distance = speed ×time 
speed = 30 m/s
time = 30 sec
∴ distance = 30× 30
                 = 900 m

Answer 2

distance coverd=speed*time
=30*30=900m