Answer:
Average speed = 50.5/2.211 = 22.84 km/h
Step-by-step 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
