Which is the greatest average speed?
i) 60 km in 3 h
ii) 68 km in 4 h
iii) 70 km in 5 h
60km/3hr = 20 km/hr
now do the others and pick the largest
do km / hr
60/3 = 20
68/4 = 17
70/5 = 14
which is fastest?
ii) 68 km in 4 h =17 km/hr
iii) 70 km in 5 h =14?? is that right??
The twenty is the highest number
Sure enough.
To find out which option has the greatest average speed, we need to calculate the average speed for each option.
Average speed is calculated by dividing the total distance traveled by the total time taken.
Let's calculate the average speed for each option:
i) Option i: 60 km in 3 h
Average speed = 60 km / 3 h = 20 km/h
ii) Option ii: 68 km in 4 h
Average speed = 68 km / 4 h = 17 km/h
iii) Option iii: 70 km in 5 h
Average speed = 70 km / 5 h = 14 km/h
Therefore, the greatest average speed is in option i) with an average speed of 20 km/h.