Question

A train 110m long is moving with a uniform velocity of 45 km/h find the time it will take to

Answer 1

WELL U HAVE NOT COMPLETED THE QUESTION BUT HERE IS THE ANSWER!

The formula for velocity is distance ÷ time taken. In symbols:

V=S÷t.

Where:

V = velocity

S = distance

t = time taken.

To solve your question:

You need to convert each unit to its standard form, so:

V = 45Km/hr = 12.5m/s

S = 1km = 1000m

t = ?

Solution

V = S÷t

12.5 = 1000÷t

Making t subject of formula:

t = 1000÷ 12.5

t = 80 seconds.

So it will take 80 seconds for a train moving at 12.5 meters every second to cross a kilometer long bridge.

However,

The question states the train is 100 meters long.

This means the last point on the train has an extra 100 meters to cover.

So it becomes:

t = 1100 ÷12.5

t = 88 seconds.