Question

Two trains of lengths 150 m and 180 m respectively are running in opposite directions on parallel tracks . if their speeds be 30 km/hr and 24 km/ hr respectively , in what time will they cross each other ​

Answer 1

Answer:

Hope it helps!! Mark this answer as brainliest if u found it useful and follow me for quick and accurate answers...

Step-by-step explanation:

Relative speed = (50 + 58) kmph

= 108 ×5/18 m/sec.

= 30 m/sec

∴  Required time =   Total length of trains  / Relative Speed

= 150 + 180 /30  seconds

= 330/30 seconds

= 11 seconds

Answer 2

Answer:

In 22 s time will they cross each other .

Step-by-step explanation:

Given,

length of the first trian is 150 m and length of the second train is 180 m.

So total length

$(150 + 180) = 330 \: m$

It is the distance which is covered by two trains.

Now speed of 1st train is 30 km/hr

$= 30 \times \frac{5}{18} = \frac{25}{3}$m/s

and speed of second trian iz 24 km/ hr

$= 24 \times \frac{5}{18} = \frac{20}{3}$m/s

Now relative speed is $( \frac{25}{3} + \frac{20}{3} ) = \frac{25 + 20 }{3} = \frac{45}{3} = 15$m/s

We know time =$\frac{distance}{speed} = \frac{330}{15} = 22$Sec