Question

An athlete completes one round of a circular track of diameter
200 m in 40 s. What will be the distance covered and the
displacement at the end of 2 minutes 20 s?​

Answer 1

Step-by-step explanation:

Time taken by athlete to complete one round = 40 seconds. Distance covered = ?? Displacement = ?? Hence, the distance covered at the end of 2 min 20 seconds is 22000 m or 22 km.

Answer 2

Answer:

Diameter of circular path (D) = 200m

Radius of circular track (r) = 200/2 = 100m

Time taken by the athlete for one round (s) =2πr

= 2×22/7×10

Speed of athlete (v) = distance/time [d/t]

= (2×2200) / (7×40)

=4400/ (7×40)

Therefore, distance covered in 140 s =

Speed (s) × time (t)

= 4400 / (7×40) ×(2 ×60+20)

= 4400 / (7×40) ×140

= 4400 × 140 / 7×40

= 2200m

No. of round in 40s = 1 round

No. of round in 140s = 140/40

= 3 1/2

After taking start from position X, the athlete will be at position Y

Diameter= 200m