defence exam CISF Head Constable Ministerial (HCM) & ASI Steno Mock Test Series Quantitative Aptitude Speed Time and Distance Average Speed
The distance between two ports X and Y is 1556 km. A boat covers the journey from X to Y at 84 km per hour and returns to X at a uniform speed of 56 km per hour. Find the average speed of the boat during the whole journey.
1
67.8 km/h
2
67.2 km/h
3
70 km/h
4
65.5 km/h