In a circular race of 2500 m, a man and a woman start from a point towards opposite directions with speeds of 37 km/h and 35 km/h, respectively. After how much time from the start of the race will they meet for the first time?

2 min 5 sec

Relative speed ( when moves in opposite direction ) = 37 + 35 = 73 km/h

72 km/h = 72 × \(\frac{5}{18}\) m/sec = 20 m/sec

Total distance to be cover = 2500 m

Time taken = \(\frac{Distance }{Speed}\) 

= \(\frac{2500 }{20}\) 

= 125 seconds

= 2 minutes 5 second