Question

Find the diameter of each circle.

Answer 1

7.8

They give you the radius, which is half the diameter.

3.9 * 2 = 7.8

Answer 2

1. 7.8 km

2. 17 ml

Explanation:

• for the first one, we are given the radius
• know that, the diameter is two times bigger than the radius
• so, for both of these we have to multiply what is given by 2

1 — 3.9 X 2 = 7.8 km

2 — 8.5 X 2 = 17 mi