Question

a person starts from his home on a straight road in his car at speed of 15 metre per second for half an hour then the fuel in his car finishes so his troops works to a petrol pump some distance ahead on the same road he gets the fuel from the pump and gets back to the car in 20 minutes then he again start moving in the direction of the motion with same speed of 50 metre per second what is the average velocity of the man in 1 hour after he started from his home

Answer 1

Answer:

first speed=15 m/sec

second speed=20 m/sec

third speed=50m/sec

so,the average is equal to

SUM OF OBSERVATIONS /

TOTAL NO. OF OBSERVATIONS

=15+20+50/3

=85/3=28.33 m/sec..

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