Question

a man running around a circle track of radius 20m covers one complete round in 40s. calculate the distance and displacement coverd by him in 3 minutes.​

Answer 1

Given : Radius = 20

Time taken to complete 1 round in 40 sec

Find : Distance Covered in 3 minutes

Solution : 3 minutes

1 minutes = 60 second

So Multiple 3 minutes to 60 sec and converted minutes to second

60 × 3 = 180 sec

Now Applying Circumference Formula

Circle = 2πR ( π Value Using 3.14 )

Circle = 2 × 3.14 × 30

Circle = 188.4 m

According To Question

Distance Covered in 40 second = 188.4 m

So Distance Covered 1 second = 188.4 / 40 ( 180 )

So Distance Covered 1 second = 188.4 × 3

So Distance Covered 1 Second = 847 . 4 m

Displacement is Zero Because initial and Final Point is Same

Distance Covered in 3 minutes 847.4m and 0