2 trains travelling in opposite directions - Wikitechy https://www.wikitechy.com/interview-questions/tag/2-trains-travelling-in-opposite-directions/ Interview Questions Tue, 07 Sep 2021 05:48:41 +0000 en-US hourly 1 https://wordpress.org/?v=6.9 https://www.wikitechy.com/interview-questions/wp-content/uploads/2025/10/cropped-wikitechy-icon-32x32.png 2 trains travelling in opposite directions - Wikitechy https://www.wikitechy.com/interview-questions/tag/2-trains-travelling-in-opposite-directions/ 32 32 Length of the train is 170 meters and speed of the train is 63 km/hour. This train can pass a bridge in 30 seconds, then find the length of the bridge ? https://www.wikitechy.com/interview-questions/problems-on-trains/length-of-the-train-is-170-meters-and-speed-of-the-train-is-63-km-hour-this-train-can-pass-a-bridge-in-30-seconds-then-find-the-length-of-the-bridge/ https://www.wikitechy.com/interview-questions/problems-on-trains/length-of-the-train-is-170-meters-and-speed-of-the-train-is-63-km-hour-this-train-can-pass-a-bridge-in-30-seconds-then-find-the-length-of-the-bridge/#respond Tue, 17 Aug 2021 15:14:40 +0000 https://www.wikitechy.com/interview-questions/?p=1800

Length of the train is 170 meters and speed of the train is 63 km/hour. This train can pass a bridge in 30 seconds, then find the length of the bridge ?

A. 355 mtrs

B. 325 mtrs

C. 365 mtrs

D. 312 mtrs

Answer : A. 355 mtrs

Explanation :

Given speed = 63 km/hr = 63 × 5/18 = 35/2 m/s
Let the length of the bridge = x mts
Given time taken to cover the distance of (170 + x)mts is 30 sec.
We know speed = distance/time
35 / 2 = ( 170 + x ) / 30
x = 355 mts.

]]> https://www.wikitechy.com/interview-questions/problems-on-trains/length-of-the-train-is-170-meters-and-speed-of-the-train-is-63-km-hour-this-train-can-pass-a-bridge-in-30-seconds-then-find-the-length-of-the-bridge/feed/ 0 Two trains of equal length, running in opposite directions, pass a pole in 18 and 12 seconds. The trains will cross each other in ? https://www.wikitechy.com/interview-questions/problems-on-trains/two-trains-of-equal-length-running-in-opposite-directions-pass-a-pole-in-18-and-12-seconds-the-trains-will-cross-each-other-in/ https://www.wikitechy.com/interview-questions/problems-on-trains/two-trains-of-equal-length-running-in-opposite-directions-pass-a-pole-in-18-and-12-seconds-the-trains-will-cross-each-other-in/#respond Tue, 17 Aug 2021 15:10:18 +0000 https://www.wikitechy.com/interview-questions/?p=1798

Two trains of equal length, running in opposite directions, pass a pole in 18 and 12 seconds. The trains will cross each other in ?

A. 14.4 sec

B. 15.5 sec

C. 18.8 sec

D. 20.2 sec

Answer : A. 14.4 sec

Explanation :

Let length of each train be x meter.
Then, speed of 1st train = x/18 m/sec
Speed of 2nd train = x/12 m/sec

Now, When both trains cross each other, time taken
= [ 2x/((x / 18 ) + (x / 12)) ] = 2x / [(2x + 3x) / 36] = 2x * 36 / 5x
= 72 / 5
= 14.4 seconds.

]]> https://www.wikitechy.com/interview-questions/problems-on-trains/two-trains-of-equal-length-running-in-opposite-directions-pass-a-pole-in-18-and-12-seconds-the-trains-will-cross-each-other-in/feed/ 0 A train of length 110 meters is running at a speed of 60 kmph. In what time, it will pass a man who is running at 6 kmph in the direction opposite to that in which the train is going ? https://www.wikitechy.com/interview-questions/problems-on-trains/a-train-of-length-110-meters-is-running-at-a-speed-of-60-kmph-in-what-time-it-will-pass-a-man-who-is-running-at-6-kmph-in-the-direction-opposite-to-that-in-which-the-train-is-going/ https://www.wikitechy.com/interview-questions/problems-on-trains/a-train-of-length-110-meters-is-running-at-a-speed-of-60-kmph-in-what-time-it-will-pass-a-man-who-is-running-at-6-kmph-in-the-direction-opposite-to-that-in-which-the-train-is-going/#respond Tue, 17 Aug 2021 15:08:04 +0000 https://www.wikitechy.com/interview-questions/?p=1797

A train of length 110 meters is running at a speed of 60 kmph. In what time, it will pass a man who is running at 6 kmph in the direction opposite to that in which the train is going ?

A. 10

B. 8

C. 6

D. 4

Answer : C. 6

Explanation :

Distance = 110 m
Relative speed = 60 + 6 = 66 kmph ( Since both the train and the man are in moving in opposite direction )
= (66 * 5 / 18) m/sec
= 55 / 3 m/sec

Time taken to pass the man = (100 * 3/ 55) = 6 s

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