Question

a train is moving at the speed of 90 km / h if the lenght of the train is 100 m how long will it take to cross a railway platform 125 m long​

Answer 1

Answer:

Speed =90km/hr=90×

18

5

=25m/sec

Distance covered = Length of train + Length of platform

=(120+230)metres=350metres

Time taken =

25

350

=14seconds

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Answer 2

Answer: 25 hour = 1 day 1 hour

Step-by-step explanation:

Solution:-

Here,

Speed of train in 1 hour ( s ) = 90 km

1) Km into m = 90 × 1000 = 90000m

2) 1 min = 90000 ÷ 60 = 1500m

3) 1m = 90000 ÷ 1500 = 60min

Length of train ( l ) = 100m

Railway platform ( p ) = 125m

Reguired length to cross ( r ) = 125m - 100m = 25m

Required time to cross the railway ( R ) = ?

Now,

R = 25 × 60 = 1500 minute = 25 hour

∴ 25 hour is required to cross a railway.

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