Question

An athlete run a circular track of diameter 2.5km with a speed of 50m/min.How much time he will take to complete 8.5 rounds of the circular track.​

Answer 1

Answer:

for completing 8.5 round he will take approx 22.2s (your answer may vary from 22.1s to 22.2s )

Explanation:

diameter of the circular track=2.5km

therefore radius of the track =2.5/2=1.25km

speed of the athlete= 50m/min=3km/hr

distance covered in 1 round= 2πr= 7.85km

time taken to compete 1 round = dist./speed

=2.61s

therefore time taken to complete 8.5 round=

8.5×2πr/3

=22.2s