Radius of circular track = r = 14 m
Perimeter of circular track,
C=2×227×14=88 m
Mukesh takes 20 rounds of the track.
Total distance covered =20×88 m=1760 m
According to question,
Time taken by Mukesh to walk 4 km = 1 hr (60 min)
Time taken by Mukesh to walk 1 m =60 min400 m
Time taken by Mukesh to walk 1760 m =604000×1760=26.4 min