Question

A superfast train moving at a speed of 120 km ph crossed a bridge of length 100, m in 12 second . Find the length of the train​

Answer 1

Total distance= length of train + length of platform

I.e 80+120= 200 m but need in kmph so 0.2 km

Time = 20 second but need in hours so 20/(3600)= 1/(180)

Speed = distance / time = 0.2*180= 36 kmph

1k views · View 1 Upvoter secsses full answer

Answer 2

The length of train is 300 meter

Solution:

Given that,

Speed of train = 120 km / hr

$120\ km/hr = 120 \times \frac{5}{18} = \frac{100}{3}\ m/s$

Length of bridge = 100 meter

Time taken = 12 second

Find the length of the train​

Let length of the train​ be "x"

$speed = \frac{length\ of\ train + length\ of\ bridge}{time}$

$\frac{100}{3} = \frac{x + 100 }{12 }\\\\400 = x + 100\\\\x = 300$

Thus length of train is 300 meter

Learn more:

Length of the train is 170 meters and speed of the train is 63 km/hour. this train can pass a bridge in 30 seconds, then find the length of the bridge.

https://brainly.in/question/5619285

A train traveling at a speed of 90km/h crosses a 220 m long platform in 15 sec. Find the length of the train

https://brainly.in/question/6979839