A.  2.5 min

B.  3 min

C.  3.2 min

D.  3.5 min

1
Correct Answer :
3 min
Explanation :

Total distance covered = [ (7/2) + (1/4) ] miles

= (15/4) miles

=> Time taken = [ 15 / (4 x 75) ] hrs

= (1/20) hrs

= (1/20) x 60 min

= 3 min


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