Select from following answers:- 30 Sec
- 50 Sec
- 40 Sec
- 45 Sec
- All Above
Speed = (45 x 5/18) m/sec = 25/2 m/sec.
Total distance covered = (360 + 140) m = 500 m.
Required time = 500 x 2/25 sec = 40 sec.
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