Trains - Online Quiz



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Following quiz provides Multiple Choice Questions (MCQs) related to Trains. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.

Questions and Answers

Q 1 - A train 132m long passes a telegraph post in 6 seconds. The speed of the train is

A - 70 kmph

B - 72 kmph

C - 79.2 kmph

D - 80 kmph

Answer : C

Explanation

speed =(132/6)m/sec =22 m/sec.
=(22*18/5) kmph = (396/5) = 79.2 kmph

Q 2 - A train 100 m long crosses a bridge of length 100 m in 6 sec. The train will cross another bridge of length 200 m in:

A - 8 sec

B - 9 sec

C - 10 sec

D - 11 sec

Answer : B

Explanation

Time taken to cover (100+100)m= 6 sec
Speed of the train = 200/6  m/sec.
Time taken to cover (100+200)m = (300*6/200) sec =9 sec.

Q 3 - A train crosses a pole in 15 sec. while it crosses a 100m long platform in 25 sec. The length of the train is

A - 125 m

B - 135 m

C - 150 m

D - 175 m

Answer : C

Explanation

Let the length of the train be x metres. Then,
 x/15 =(100+x)/25  ⇒ 25x=1500+15x ⇒ 10x = 1500 ⇒ x = 150
Hence, the length  of the train is 150 m.

Q 4 - Two trains are running in opposite directions at 36kmph and 45kmph cross each other in 20 sec. if one train is 200m long, the length of the other train is

A - 144 m

B - 200 m

C - 240 m

D - 250 m

Answer : D

Explanation

let the length of the other train be x meters.
Sum of their length =(200+x)m
Relative speed =(36+45) kmph =81kmph = (81*5/18)m/sec. = 45/2 m/sec.
(200+x)/ (45/2) = 20  ⇒ 400 +2x = 900 ⇒ 2x = 500  ⇒ x = 250
∴  length of the other train is 250m 

Q 5 - A train of length 150m takes 10 sec. to pass over another train 100m long coming from the opposite direction. If the speed of the first train be 30 kmph, then the speed of the second train is

A - 54 kmph

B - 60 kmph

C - 72 kmph

D - 36 kmph

Answer : B

Explanation

Relative speed =(150+100)/10 m/sec.  =25 m/sec.= (25*18/5)km/hr = 90 km/hr 
∴ speed of the  second train = (90-30) kmph  = 60 kmph

Q 6 - Two train travel in opposite direction at 36 kmph and 45kmph. A man sitting in a slower train passes the faster train in 8 sec. The length of the faster train is

A - 80 m

B - 100 m

C - 120 m

D - 180 m

Answer : D

Explanation

Relative speed =(36+45)km/hr =(81*5/18)m/sec. =45/2m/sec.
Length of the train = distance covered in 8 sec. at 45/2m sec. = (45/2*8)= 180 m

Q 7 - A train X speeding with 120kmph cross another train Y, running in the same direction, in 2 min. If the length of the trains X and Y be 100 m and 200m respectively, What is the speed of train Y

A - 111 kmph

B - 123 kmph

C - 127 kmph

D - 129 kmph

Answer : A

Explanation

let the speed of train y be x km/hr.
Speed of x relative to y =(120-x) km/hr
=[ (120-x)*5/18]m/sec. = (600-5x)/18  m/sec.
300/ (600-5x)/18 =120 ⇒120 (600-5x) =5400
⇒ 600-5x =45 ⇒ 5x =555 ⇒ x =111
Speed of train y = 111km/hr 


aptitude_trains.htm

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