a train 400 m long is running at a speed of 75 km/hour . how much time does it take to cross a telegraph post.
Answers
Answered by
2
hello mate here is ur ans
, if the distance of telegraph post is not given
then u can take length of train as distance
since speed is given in km/hr , convert it into m/s
hence in terms of m/s it is given as 75×5÷18
= 20.83m/s hence , v=20.83m/s
since we know that speed = distance ÷time
therefore , v=d÷t ,then time = distance÷speed=
400÷20.83= 19.20s
hence it takes 19.20 s to reach telegraph post
########be brainly !!!!
, if the distance of telegraph post is not given
then u can take length of train as distance
since speed is given in km/hr , convert it into m/s
hence in terms of m/s it is given as 75×5÷18
= 20.83m/s hence , v=20.83m/s
since we know that speed = distance ÷time
therefore , v=d÷t ,then time = distance÷speed=
400÷20.83= 19.20s
hence it takes 19.20 s to reach telegraph post
########be brainly !!!!
Answered by
1
WE KNOW
DISTANCE / TIME = SPEED
0.4/HOUR = 75 KM/HOUR
1/HOURS = 75/0.4
==> HOURS = 4/10*75
==>ANS = 4/750
SO, I HOPE U UNDERSTAND
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