Question

justin walked 300 meters in 2 minutes, stopped to talk to a friend for 3 minutes, continued walking another 500 meters in 3 minutes. what his average speed?

Answer 1

Explanation:

We know that:

Speed in first half of journey = Distance/Time

= 300m/60×2 sec

= 300/120

= 5/2

= 2.5m/s

Speed in second half of journey = Distance/Time

= 500m/60×3sec

= 500/180

= 4.16m/s

Therefore,now:

Average Speed = Final speed + Initial Speed / 2

= 2.5+4.16/2

= 6.66/2

= 3.33 m/s