Trains - Online Quiz


Advertisements


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 with a speed of 60 kmph crosses a pole in 30 seconds. The length of the train is

A - 500 m

B - 750 m

C - 900 m

D - 1000 m

Answer : A

Explanation

speed =  (60*5/18)m/sec  = 50/3 m/sec.
Length of the train = (50/3* 30)m = 500 m 

Q 2 - A train travelling at a speed of 30 m/sec crosses a platform 600 m long in 30 sec. The length of the train is?

A - 120 m

B - 150 m

C - 200 m

D - 300 m

Answer : D

Explanation

Let the length of the train be X m . then its speed =(600+x)/30 m/sec.
∴ (600+X)/30 =30 ⇒ 600+x =900 ⇒ x =300m

Q 3 - A train 270 m long is moving at a speed of 25 kmph. It will cross a man coming from the opposite direction at a speed of 2kmph in

A - 36 sec

B - 32 sec

C - 28 sec

D - 24 sec

Answer : A

Explanation

Their relative speed =(25+2)kmph =27kmph  = (27*5/18) m/sec. =15/2 m/sec.
Required time = 270/ (15/2) sec. = (270*2)/15   sec.= 36 sec.

Q 4 - A train overtakes two persons two persons walking in the same direction in which the train is going. These persons are walking at the rate of 2km/hr and 4km/hr and the train passes them completely in 9 sec. and 10 sec. respectively. The length of the train is

A - 72 m

B - 54 m

C - 50 m

D - 45 m

Answer : C

Explanation

let the length of the train be X km and its speed be y km/hr.
Speed of the train relative to first man = (y-2) km/hr
Speed of the train relative to second man =(y-4)km/hr
∴ x/(y-2) = 9/(60*60) and x/(y-4) =10/(60*60)
⇒ y-2 =400x and y-4 =360x
⇒ 400x+2=360x+4 ⇒40x=2 ⇒x=1/20km =(1/20*1000)m= 50m
∴ length of the train =50m

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

Advertisements