Question

the radius of circle a is 15 units. the radius of circle b is 2 times the radius of circle a. what is the circumference of circle b? leave your answer in terms of π. □π units

Explanation:

Step1: Find radius of circle B

Radius of B = 2 × radius of A = 2 × 15 = 30 units.

Step2: Use circumference formula

Circumference of a circle is \( C = 2\pi r \). For circle B, \( r = 30 \), so \( C = 2\pi×30 = 60\pi \).

Answer:

60