Question

two train 240 m and 270 m in the length are running to what each other on parallel line one rate of 60 km per hour and another at 48 km per hour how much time will they take to cross each other​

Answer 1

Answer:Since the trains are running in opposite directions, they will cross each other at the sum of their speeds. ie., (60+48)= 108 Km/ hr.

To convert the speed from Km/hr to m/sec, we have to multiply by (5/18).

This is because 1Km/1hr= 1000 m/3600 sec= 5/18 m/sec.

The Speed is 108 x (5/18)= 30 m/sec.

They have to cross a distance of (240+270)= 510 metres.

So the distance of 510 metres will be crossed in = 510/30= 17 seconds.

To summarize the TWO trains will cross each other in 17- seconds.

Explanation:

Answer 2

Answer:

The two trains will take 17 seconds to cross each other​.

Explanation:

Given, the length of two trains are 240m and 270m and are running with  speed 60 km/hour and 48 km/hour respectively.

Since these trains are travelling in opposite directions.  They will cross each other at the sum of their speeds.

Relative speed = $=(60+48)= 108 Km/ hr.$

$\frac{ 1Km}{1hr}= \frac{1000 m}{3600 sec}= \frac{5}{18} m/sec.$

We have to multiply by $(5/18)$ to convert the speed from Km/hr into m/sec.

The relative speed of trains will be $= 108 \times\frac{ 5}{18}= 30 m/sec.$

Trains have to cross a distance $=240+270= 510\; m$

So trains covers the distance of 510 m with relative speed 30m/s:-

So, the time taken by trains to cross each other $=\frac{ 510}{30}= 17 \;sec.$

Therefore, the two trains will take 17 seconds to cross each other​.

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