Question

a train 600 metres long is running at a speed of 90 km hr if it crosses a tunnel in one minute then the length of the tunnel​

Answer 1

Answer:

Let the length of tunnel be x

First change 90km/hr to m/s

$\frac{5}{18} \times 90 = 25 \: \: \frac{m}{s}$

total distance covered will be 600+x.

time taken is 60 sec.

time×speed=distance

60×25=600+x

1500-600=x

x = 900

Hence the length of the tunnel is 900 metres...

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Answer 2

The length of the tunnel​ is 900 m

Step-by-step explanation:

Length of train = 600 m

Let the length of tunnel be x

Total distance = 600+x

Speed = 90 km/hr = $90 \times \frac{1000}{60}=1500 m/min.$

Time = 1 minute

$Time = \frac{Distance}{Speed}\\1 = \frac{600+x}{1500}$

1500=600+x

900=x

Hence the length of the tunnel​ is 900 m

#Learn more:

A train 700 metres long is running at the speed of 72 km /h. if it crosses a tunnel in 1 minute then the length of the tunnel is:

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