Topics

General Knowledge
General Science
General English
Aptitude
General Computer Science
General Intellingence and Reasoning
Current Affairs
Exams
Elementary Mathematics
English Literature

A train moving with uniform speed crosses a pole in 2s and a 250 m long bridge in 7s. Find the length of the train.

A) 150 m
B) 120 m
C) 100 m
D) 80 m

Correct Answer:



C) 100 m

Description for Correct answer:

Let length of the train be L m.

According to the question,

\( \Large \frac{L}{2} = \frac{L+250}{7} \)

=> 7L = 2 L +500

=> 7L - 2L = 600

=> 5L = 500

Therefore, L = \( \Large \frac{500}{5} \) = 100 m

Part of solved Trains questions and answers : >> Aptitude >> Trains

Comments

Similar Questions

1). A train travelling with uniform speed crosses two bridges of lengths 300 m and 240 m in 21 s and 18 s, respectively. Find the speed of the train.

A). 72 km/h

B). 68 km/h

C). 65 km/h

D). 60 km/h

2). The relative speed of a train in respect of a car is 90 km/h when train and car are moving opposite to each other. Find the actual speed of train, if car is moving with a speed of 15 km/h.

A). 80 km/h

B). 105 km/h

C). 75 km/h

D). 100 km/h

3). A 440 m long train is running at 240 km/h. In what time will it pass a man running in the direction opposite to that of the train at 24 km/h?

A). 9 s

B). 6 s

C). 12 s

D). 4 s

4). A 400 m long train takes 36 s to cross a man walking at 20 km/h in the direction opposite to that of the train. What is the speed of the train?

A). 20 km/h

B). 80 km/h

C). 15 km/h

D). 11 km/h

5). A 280 m long train crosses a platform which is three times of its length, in 6 min 40 s. What is the speed of the train?

A). 3.2 m/s

B). 1.4 m/s

C). 2.8 m/s

D). Cannot be determined

6). Two trains of lengths 105 m and 90 m, respectively run at the speeds of 45 km/h and 72 km/h, respectively in opposite directions on parallel tracks. Find the time which they take to cross each other.

A). 5 s

B). 6 s

C). 7 s

D). 8 s

7). A train passes two persons who are walking in the direction opposite to the direction of train at the rate of 10 m/s and 20 m/s respectively in 12 s and 10 s, respectively. Find the length of the train.

A). 500 m

B). 900 m

C). 400 m

D). 600 m

8). A train A is 180 m long, while another train B is 240 m long. A has a speed of 30 km/h and B's speed is 40 km/h. If the trains move in opposite directions, find when will A pass B completely?

A). 21 s

B). 21.6 s

C). 26.1 s

D). 26 s

9). A train of length 180 m, running by 72 km/h to cross the another train B which is running in the opposite direction to speed of 108 km/h and length is 120 m, in how much time?

A). 23 s

B). 12 s

C). 6 s

D). 30 s

10). A 110 m long train is running at a speed of 60 km/h. How many seconds, does it take to cross an another train of length 170 m, which is standing on parallel track?

A). 15.6 s

B). 16.8 s

C). 17.2 s

D). 18 s