Question

The circumference

Find the length of the radius.
Give your answer rounded to 3 SF.
→ r = 0
of a circle is 39.5km.
km

Answer 1

19.8km (to 3 s.f.)

Explanation:

circumference= 39.5km

circumference= 2 × radius

radius= 39.5÷2

= 19.75km

= 19.8km (to 3 s.f.)