Correct Answer: Option A
Formula for converting from km/hr to m/s: X km/hr
= (X x (5/18)) m/s.
Therefore, Speed = (45 x 5/18) m/sec = 25/2 m/sec.
Total distance to be covered = (360 + 140) m = 500 m.
Formula for finding Time = (Distance/Speed)
Required time = (500 x 2)/25 sec = 40 sec.
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