### Global Statistics

All countries
521,355,498
Confirmed
Updated on May 16, 2022 11:28 am
All countries
477,758,112
Recovered
Updated on May 16, 2022 11:28 am
All countries
6,288,644
Deaths
Updated on May 16, 2022 11:28 am

# A Train Speeds Past a Pole in 15 Seconds and a Platform 100 meter Long in 25 Seconds. Its Length is?

### Computer MCQs Series for PPSC, FPSC – Most Repeated MCQs | Set 4

What are you looking for? Letâ€™s dig in quickly

Recommended

## Explanation

A train speeds past a pole in 15 seconds and platform in 25 seconds. Our final aim is to find out the length of the train. Trainâ€™s length would be calculated with speed distance time formula.

There are two things in this question.

• Trains crosses pole in 15 seconds; it means we are only talking about the length of the train.
• Trains crosses platform in 25 seconds; it means we are talking about length of the platform as well as the length of the train.

Let suppose the length of the train is y then

Total length = length of train + length of platform

Total length = y + 100

Another thing that we need is the speed of train which is very easy to find out.

Speed of train = y / 15

Now, we can calculate the length of the train by placing all the values in the speed distance time formula;

Speed = Distance / Time

Distance = Speed x Time

### To Find

Length of the train = ?

## Solution

As, we know that

Distance = speed x time

y + 100 = y/15 x 25

y + 100 = y/3 x 5

3(y + 100) = 5y

3y + 300 = 5y

5y â€“ 3y = 300

2y = 300

### Conclusion

So if a train speeds past a pole in 15 seconds and a platform 100 meter long in 25 seconds. Its length is 150 m

### Computer MCQs Series for PPSC, FPSC – Most Repeated MCQs | Set 6

error: Content is protected !!