A. 2.5 min
B. 3 min
C. 3.2 min
D. 3.5 min
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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