Question

A train is 100m long and is moving with a speed of 72kmph. The time taken by the train to cross
a bridge of length 0.5km is [ ]
a) 25s b) 35s c) 30s d) 28s
2. Speedometer of a car measures [ ]
a) average speed b) acceleration c) instantaneous speed d) uniform speed
3. A car runs at a constant speed on a circular track of radius 100m and takes 62.8s for every
circular lap. The average speed for each circular lap is [ ]
a) 15 ms–1 b) –10 ms–1 c) 10 ms–1 d) 0
4. A boy walks to his school at a distance of 6km with a constant speed of 2.5kmph and walks back
with a constant speed of 4kmph. His average speed for the round trip expressed in kmph is
a)
24
13 b)
40
13 c) 3 d)
1
2

[ ]
5. A train runs past a telegraph pole in 15s and through a tunnel of length 450m in 45s. The length
of the train is [ ]
a) 225m b) 325m c) 425m d) 450m
6. A car covers 60km with a uniform speed of 120kmph and the next 60km with a uniform speed of
80kmph. The total time taken by the car is [ ]
a) 75min b) 60min c) 55min d) 80min
7. A person takes time t to go once around a circular path of diameter 2R. The speed (v) of this
person would be [ ]
a)
t
2 R

b)
2 R
t


c)
2 R
t


d) 2 R.t 

8. A motor cyclist drives A to B with a uniform speed of 30kmph and returns back with a speed of
20kmph. Then the average speed is [ ]
a) 20kmph b) 24kmph c) 42kmph d) 52kmph
9. A runner makes one lap around a 200m circular track in 25s. The average speed of the runner is
a) 0 b) 4ms–1 c) 8ms–1 d) 16ms–1
10. If a car covers first
2
5
th of the total distance with a speed v1

and the remaining
3
5
th of the total

distance with a speed v2

, then its average speed is [ ]

a) 1 2
1
v v
2

b) 1 2
1 2
5v v
2v 3v 

c) 1 2
1 2
2v v
v v 

d) 1 2
1 2
5v v
3v 2v

Answer 1

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