Question

when a marathon runners complete 3 round a circular track covers a distance of 66 km find the radius of the track​

Answer 1

Step-by-step explanation:

3 round distance = 66km

1 round distance = 66/3 => 22km

So,

r = ?

circumference of circle = 22km

=》 2 × 22/7 × r = 22

=》 r = 22 × 7 / 2 × 22

=》 r = 7/2

=》 r = 3.5 km