Question

Tarzan Swims a distance of 1.5 km at an average speed of 2.5 km/h,cycles 40 km in 1 and 1/2 and runs at an average speed of 9km/h for1 1/9h.find the average speed of all.

Answer 1

22.84 km/h.

Explanation:

Answer 2

Average speed = 50.5/2.211 = 22.84 km/h

Explanation:

First phase;

Tarzan Swims a distance of 1.5 km at an average speed of 2.5 km/h,

Time taken = 1.5/2.5 = 0.6 hour

Second phase;

cycles 40 km in 1 and 1/2 hours

Time taken = 1.5 hours

Third phase;

Runs at 9km/h for1 1/9h

Time taken = 1.111 hour

Average speed = total distance travelled/total time taken

Total distance travelled = 1.5+40+9= 50.5km

Total time taken = 0.6+1.5+1.111 = 2.211 hour

Average speed = 50.5/2.211 = 22.84 km/h