Direction : What should come in place of question mark (?) in the following questions ?

21) Two goods train each 500 m long, are running in opposite directions on
parallel tracks. Their speeds are 45 km/hr and 30 km/hr respectively.
Find the time taken by the slower train to pass the driver of the faster
one.

- A)12 sec
- B)24 sec
- C)48 sec
- D)60 sec

**Answer: **
B

22) Two trains are running in opposite directions with the same speed. If
the length of each train is 120 metres and they cross each other in 12
seconds, then the speed of each train (in km/hr) is:

- A)10
- B)18
- C)36
- D)72

**Answer: **
C

23) Two trains of equal lengths take 10 seconds and 15 seconds respectively
to cross a telegraph post. If the length of each train be 120 metres, in
what time (in seconds) will they cross each other travelling in
opposite direction?

- A)10
- B)12
- C)15
- D)20

**Answer: **
B

24) A train 108 m long moving at a speed of 50 km/hr crosses a train 112 m
long coming from opposite direction in 6 seconds. The speed of the
second train is:

- A)48 km/hr
- B)54 km/hr
- C)66 km/hr
- D)82 km/hr

**Answer: **
D

25) Two trains are running at 40 km/hr and 20 km/hr respectively in the same
direction. Fast train completely passes a man sitting in the slower
train in 5 seconds. What is the length of the fast train?

- A)23 m
- B)
- C)
- D)29 m

**Answer: **
C

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