# Trains - Online Quiz

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.

Q 1 - A train with a speed of 60 kmph crosses a pole in 30 seconds. The length of the train is

### 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 - How much time will a train 171 m long take to cross a bridge 229 m long , if it is running at a speed of 45 kmph?

### Answer : C

### Explanation

Speed = (45*5/18)m/sec = 25/2 m/sec. Required time =(171+229)/(25/2) sec. = (400*2/25)sec. =32 sec.

Q 3 - A train 100 m long moving at a speed of 50km/hr crosses a train 120m long coming from opposite side on parallel tracks in 6 sec. The speed of the second train is

### Answer : B

### Explanation

let the speed of the second train be x kmph. Their relative speed = (50+x) kmph ={ (50+x)* 5/18) m/sec. Sum of their lengths = (100+120)m =220 m 220/ [(50+x)*5/18] = 6 ⇒30 (50+x)= 3960 ⇒ 30x =(3960-1500) = 2460 X = 82 Speed of the second train = 82 kmph.

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

### 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 moving at the rate of 36 km per hour crosses a standing man in 10 sec. It will cross a platform 55m long, in

### Answer : D

### Explanation

speed of the train = (36*5/18)m/sec. =10m/sec. Let the length of the second train be x meters. Then, x/10 =10 ⇒ x =100m Time taken by the train to cross the platform = (100+55)/10 sec.=31/2 sec.

Q 6 - 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 sec.What is the length of the faster train?

### Answer : D

### Explanation

Relative speed = (40-20)km/hr = 20km/hr =(20*5/18)m/sec. =50/9 m/sec. Length of faster train = distance travelled by it in 5 sec. at 50/9 m/sec. =(50/9*5)m = 250/9 m

Q 7 - Two man running in opposite directions cross a man standing on the platform in 27 sec. and 17 sec. respectively and they cross each other in 23 seconds. The ratio of their speeds is

### Answer : B

### Explanation

Let the speed of the two trains be x m/sec. and y m/sec. Length of the first train =(27x)m Length of the second train = (17y)m (27x+17y)/(x+y) = 23 ⇒ 27x+17y = 23x+23 y ⇒4x=6y ⇒ 2x=3y ⇒ x/y 3/2 Ratio of their speed = 3:2