Question

A boy travels a distance of 120 m in 1 minute. what is His speed ​

Answer 1

1 minute = 60 seconds.

$Speed =Time/Distance$

$Speed = 120/60$

$His \: speed = 2ms−1$

Answer 2

Answer:

If you Want to find the Answer in m/s

Distance travelled by the boy = 120m

Time taken to travel 120m = 1 min = 60s

Speed of travelling = Distance Travelled / Time Taken

= 120/60

= 2 m/s

If you Want to find the Answer in km/hr. ( TOO MUCH COMPLICATED)

First, convert the distance into km.

Distance travelled = 120m = 0. 12 km

Second, convert the time into hours.

Time taken to travel 0. 12 km = 1min = 0. 0167 hrs

Speed of travelling = Distance Travelled / Time Taken

= 0. 12 / 0.0167

= 7. 18 km/hr

YOU SHOULD NOT USE THIS km/hr METHOD IF YOU WERE GIVEN THE VALUES meters AND seconds, ALWAYS USE THE m/s METHOD. I GAVE THIS km/hr EXPLANATION TO SHOW HOW COMPLICATED THE SUM BECOMES IF YOU USE km/hr METHOD WHEN YOU WERE GIVE THE VALlUES OF meters AND seconds.