Question

a cyclist moves around a circular track with a speed of 4.4m/second the cyclist covers five rounds in 25 min what is the radius of the circular track

Answer 1

time = 25 mins = 25 x 60 = 1500 sec
speed = 4.4 M/s
dist covered = 2πr x 5

speed = dist / time

4.4 = 2πr x 5/1500

2.2 = πr x 1/300
2.2 x 300 = π x r
r = 2.2 x 300 / π
r = 2.2 x 300 x 7/22
r = 300 x 7/10
r = 30 x 7 M
r = 210 M
Answer - Radius of track = 210 M

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