A.  40 sec

B.  42 sec

C.  44 sec

D.  46 sec

1
Correct Answer :
40 sec
Explanation :

Speed = [ 45 x (5/18) ] m/sec = (25/2) m/sec

Total distance to be covered = (360 + 140) m = 500 m

=> Required time = Distance / Speed = (500 x 2) / 25 = 40 sec


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