33. A car travels 1/3 of the distance on a straight road with a velocity of 10 km/h, the next 1/3 with a
velocity of 20 km/h and the last 1/3 with a velocity of 60 km/h. What is the average velocity of the
car for the whole journey?
(a) 18 km/h
(b) 10 km/h
(c) 20 km/h
(d) 15 km/h
Answers
Answered by
1
Answer:
Correct option is a
Step-by-step explanation:
let distance to be covered is 1800.
then time taken for first 1/3 is T
1
=
10
600
=60sec
time taken for second 1/3 is T
1
=
20
600
=30sec
time taken for third 1/3 is T
1
=
60
600
=10sec
total time taken is 100 sec.
av velocity is
100
1800
=18km/s.
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