The correct option is C 8.25hours
1 km = 1000m
∴ 5km = 5000 m
Time taken to cover (2000 m + 3000 m) is the same as the time taken to cover 5000m.
∵ (2000 m + 3000 m) = 5000 m
Now 5000m = 5km.
hence, the time taken by Manu to cover (2000 m + 3000 m) is the same as the time taken to cover 5 km, that is 8.25 hours.