Question

How long will a train 450 m long travelling at 45 km/h take to cross a tree?\
Answer in seconds
Choose:
* 30 seconds
*36 seconds
*42 seconds
*48 seconds

Answer 1

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Step-by-step explanation:

This is a question on distance, speed and time where the first two variables are given and the third variable unknown. Continuing,

Distance = 40 m and speed = 45 km/h = 45,000 m / 3600 s = 12.5 m/s

Time = distance / speed

Time = 450 m / 12.5 m/s

Time = 36 seconds

Answer 2

Answer:

36 seconds

Step-by-step explanation:

given:-

distance=450m

speed=45km/hr

time=?

change speed in m/s 45×5÷18 then we get 225/18 m/s

we know that. TIME =DIST÷TIME

450m÷225/18m/s= 36second... ans...

I HOPE YOU UNDERSTOOD