22
Q:

# Two trains having equal lengths, take 10 seconds and 15 seconds respectively to cross a post. If the length of each train is 120 meters, in what time (in seconds) will they cross each other when traveling in opposite direction?

 A) 10 B) 25 C) 12 D) 20

Explanation:

Speed of train 1 = $12010m/sec$ = 12 m/sec

Speed of train 2 =$12015m/sec$  = 8 m/sec

if they travel in opposite direction, relative speed = 12 + 8 = 20 m/sec

distance covered = 120 + 120 = 240 m

time = distance/speed = 240/20 = 12 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

Explanation:

0 122
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

Explanation:

0 169
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

Explanation:

1 142
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

Explanation:

0 207
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

Explanation:

0 230
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

Explanation:

0 232
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

Explanation:

1 215
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