Question

Two persons start running simultaneously around a circular track of length 400 m from the same point at speeds of 15 kmph and 25 kmph. When will they meet for the first time any where on the track if they are moving in the opposite direction ?

Answer 1

Time taken to meet for the first tr anywhere on the track

= Lenght of the track / relative speed

= 300/ (15+25)5/18 = 300 × 18 / 40 × 5

= 27second

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Answer 2

Answer :- 36 seconds

Time when they will first meet on the track = Track length / relative speed

Time when they will first meet on the track = 400 / (15 + 25) x 18 /5

Time when they will first meet on the track = 400 / 40 x 18 /5

Time when they will first meet on the track = 36 seconds