16
Q:

A train is traveling at 48 kmph . It crosses another train having half of its length , traveling in opposite direction at 42 kmph, in 12 seconds. It also passes a railway platform in 45 seconds. What is the length of the platform ?

A) 500 B) 400
C) 360 D) 480

Answer:   B) 400



Explanation:

Speed of train 1 = 48 kmph
Let the length of train 1 = 2x meter

Speed of train 2 = 42 kmph
Length of train 2 = x meter (because it is half of train 1's length)

Distance = 2x + x = 3x
Relative speed= 48+42 = 90 kmph = (90*5/18)  m/s = 25 m/s 


Time = 12 s

Distance/time = speed 

=>3x/12 = 25 (25*12)/3 

Length of the first train = 2x = 200 meter
Time taken to cross the platform= 45 s

Speed of train 1 = 48 kmph = 480/36 = 40/3 m/s

Distance = 200 + y     [where y is the length of the platform] 

x =100m => 200+y = 45* 40/3
y = 400m

Q:

The ratio between the speeds of two trains is 2 : 5. If the first train covers 350 km in 5 hours, then the speed (in km/h) of the second train is:

 

A) 180 B) 175
C) 165 D) 150
 
Answer & Explanation Answer: B) 175

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4 328
Q:

A train of length 350 m crosses a bridge of length 250 m in 20 seconds. What is the speed of the train (in km/h)?

 

A) 88 B) 72
C) 108 D) 95
 
Answer & Explanation Answer: C) 108

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2 682
Q:

The distance between the two railway stations is 1176 km. To cover this distance, an express train takes 5 hours less than a passenger train while the average speed of the passenger train is 70 km/h less than that of the express train. The time taken by the passenger train to complete the travel is:

 

A) 12 hours B) 23 hours
C) 17 hours D) 18 hours
 
Answer & Explanation Answer: A) 12 hours

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3 657
Q:

A train travels the distance between stations P and Q at a speed of 126 km/h, while in the opposite direction it comes back at 90 km/h. Another train travels the same distance at the average speed of the first train. The time taken by the second train to travel 525 km is:

 

A) 4 hours 20 min B) 5 hours 20 min
C) 5 hours D) 4 hours
 
Answer & Explanation Answer: C) 5 hours

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2 577
Q:

A train, 150 m long is running at 90 km/h. How long (in seconds) will it take to clear a platform that is 300 m long?

 

A) 6 B) 12
C) 50 D) 18
 
Answer & Explanation Answer: D) 18

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1 537
Q:

A train without stop page travels with an average speed of 70km/h, and with stoppage, it travels with the average speed of 56km/h. How many minutes, does the train stop on an average per hour?

 

A) 12 B) 14
C) 16 D) 15
 
Answer & Explanation Answer: A) 12

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3 654
Q:

Train ‘A’ runs at a speed of 80 kmph and leaves station ‘X’ at 11.00 a.m. Train ‘B’ leaves station ‘X’ at 11.15 a.m.in the same direction, on the same day . At what speed train ‘B’ should run in order to catch train ‘A’ at station ‘Y’ located at a distance of 60 km?

 

A) 120 km/h B) 125 km/h
C) 115 km/h D) 110 km/h
 
Answer & Explanation Answer: A) 120 km/h

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4 518
Q:

A train without stoppage travels with an average speed of 50 km/h, and with stoppage, it travels with an average speed of 40 km/h. For how many minutes does the train stop on an average per hour ?

 

A) 12 B) 13
C) 14 D) 15
 
Answer & Explanation Answer: A) 12

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1 595