A metro train starts from rest and in five seconds achieves After that it moves with constant velocity and comes to rest after travelling 45 m with uniform retardation. If total distance travelled is 395 m, find total time of travelling |
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1) |
12.2 s |
2) |
15.3 s |
3) |
9 s |
4) |
17.2 s |

A metro train starts from rest and in five seconds achieves After that it moves with constant velocity and comes to rest after travelling 45 m with uniform retardation. If total distance travelled is 395 m, find total time of travelling |
|||||||

1) |
12.2 s |
2) |
15.3 s |
3) |
9 s |
4) |
17.2 s |

1 Answer

127 votes

Given,

From first equation of motion.

Or

So, distance travelled by metro train in 5 s

Distance travelled before coming to rest

So, from third equation of motion

Or

Time taken in travelling 45 m is

Now, total distance

Or

Hence, total time taken in whole journey

127 votes

127