Question

A train takes 4Hr to cover a distance 200km . Find its speed in metre/sec ??​

Answer 1

time = 4 hour

1 hour = 3600 seconds

4 hour = 4 × 3600 seconds

4 hour = 14400 seconds

distance =200km

1km = 1000m

200km = 200000m

speed = distance/time

s = 200000/14400

s = 13.8m/s

Answer 2

Explanation:

speed = distance/time

speed = 200km / 4hr

speed = 50km/hour

now, 1km = 1000m

1hr = 3600sec

1000/3600 = 5/18m/sec

so, multiply 50km/hr with 5 and divide by 18

50 × 5/18 = 250/18

= 125/9 metre/sec