Question

Two person start running simultaneously on a straight track with velocities 18 kmph due east and72 kmph due west.If , initially the distance between the persons is 500m , the time intervals after which they meet each other is

Answer 1

Answer:

The time intervals after which they meet each other is 20 sec

Explanation:

According to the problem the distance between one person to another is 500 m

therefore, length of the track l= 500m

Now the velocity of one person is 18 km/h

Speed of one person =  18 × 5 /18  = 5 m/s

the velocity of another person is 72 km/h

Speed of another person =  72 × 5 /18  = 20 m/s  

A they are going in opposite direction,

Now the required time to meet again ,

Time,t  = l / Relative Speed

 =  500 /(5+20)

  = 20 sec

Answer 2

Explanation:

तू पर्सन स्टार्टिंग रनिंग सिम्मम