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 covered at the end of 2 m 20s​

Answer 1

Answer:

Hence, the distance covered at the end of 2 min 20 seconds is 22000 m or 22 km And displacement is 200 m as it returns to the initial position.

Step-by-step explanation:

Given that

Diameter of circular track = 200 m

Radius, r = 200/2 = 100 m

Time is taken by an athlete to complete one round = 40 seconds.

We have to find

Distance covered = ??

Displacement = ??

Formula to be used :-

Speed = Distance/Time

Circumference of circle = 2πr

Solution :-

2 min 20 seconds = 140 seconds

Number of rounds = 140/4 = 35

= Distance covered = 35 × circumference

= Distance covered = 35 × 2 × 22/7 × 100

= Distance covered = 5 × 2 × 22 × 100

= Distance covered = 22000 m

Hence, the distance covered at the end of 2 min 20 seconds is 22000 m or 22 km.

And displacement is 200 m as it returns to the initial position