27
Q:

Two trains 140 m and 160 m long run at the speed of 60 km/hr and 40 km/hr respectively in opposite directions on parallel tracks. The time (in seconds) which they take to cross each other, is:

A) 9 B) 9.6
C) 10 D) 10.8

Answer:   D) 10.8



Explanation:

Relative speed = (60 + 40) km/hr =[ 100 x ( 5 / 18 ) ]m/sec = ( 250 /9 ) m/sec.
Distance covered in crossing each other = (140 + 160) m = 300 m.
Required time = [ 300 x ( 9/250 ) ] sec = ( 54/ 5 )sec = 10.8 sec.

Q:

The speed of a train is 72 km/hr and its length is 200 meters. What will be the time (in minutes) taken by the train to cross a pole?

 

A) 1/6 B) 3/5
C) 5 D) 10
 
Answer & Explanation Answer: A) 1/6

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1 471
Q:

Two stations L and M are 180 km apart from each other. A train leaves from L to M and simultaneously another train leaves from M to L. Both trains meet after 9 hours. If the speed of the first train is 10 km/hr more than the second train, then what is the speed (in km/hr) of the slower train?

 

A) 9 B) 5
C) 12 D) 15
 
Answer & Explanation Answer: B) 5

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2 471
Q:

X and Y are two stations which are 280 km apart. A train starts at a certain time from X and travels towards Y at 60 km/h. After 2 hours, another train starts from Y and travels towards X at 20 km/h. After how many hours does the train leaving from X meets the train which left from Y?

 

A) 2 hours B) 6 hours
C) 3 hours D) 4 hours
 
Answer & Explanation Answer: D) 4 hours

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1 403
Q:

A train travelling at constant speed crosses two persons walking in the same direction in 8 seconds and 8.4 seconds respectively. The first person was walking at the speed of 4.5 km/hr while the second was walking at the speed of 6 km/hr. What was the speed of the train in km/hr?

 

A) 42 B) 40
C) 32 D) 36
 
Answer & Explanation Answer: D) 36

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0 421
Q:

Train X travelling at 60 km/h overtakes another train Y, 225 m long, and completely passes it in 72 seconds. If the trains had been going in opposite directions, they would have passed each other in 18 seconds. The length (in m) of X and the speed (in km/h) of Y are, respectively:

 

 

A) 245 and 54 B) 255 and 40
C) 255 and 36 D) 245 and 45
 
Answer & Explanation Answer: C) 255 and 36

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0 412
Q:

A train moving with a uniform speed covers 338 m in 50 s. What is its speed?

A) 5.76 m/s B) 7.76 m/s
C) 6.76 m/s D) 4.76 m/s
 
Answer & Explanation Answer: C) 6.76 m/s

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0 391
Q:

A train travelling at constant speed crosses two persons walking in the same direction in 4 seconds and 4.2 seconds, respectively. The first person was walking at the speed of 4.5 kmph while the second was walking at the speed of 6 kmph. What was the speed of the train in kmph?

A) 42 B) 36
C) 40 D) 32
 
Answer & Explanation Answer: B) 36

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1 375
Q:

Two trains, one 153 m long and the other 127 m long; coming from opposite directions crossed each other in 7.2 seconds. The combined speed of the two trains every hour would then be:

 

A) 140 km/h B) 105 km/h
C) 70 km/h D) 280 km/h
 
Answer & Explanation Answer: A) 140 km/h

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0 411