Question

Displacement of a person moving from A to B along semi circular path is 100m. What is distance travelled by him? ​

Answer 1

Hey mate,

Ur Answer is 50π.

Explanation:::::----------

The body has traveled a semicircular path. So it's displacement is 2r.

So r =100/2=50

Now distance=1/2*2πr

This gives π*50=50π=157.07m

Hope it helps u dear friend.........

Answer 2

Answer:

r=31.84 m

Explanation:

Distance travelled by the person[displacement]=the circumference of the semi circular path=100m

circumference of a semi circle =πr

100=3.14*r

100/3.14=r

r=31.84m

∴r=32m--------[to the nearest whole number]