Question

question 10 of 10
if a circle has a diameter of 30 meters, which expression gives its area in square meters?

a. 30 • π

b. 15² • π

c. 15 • π

d. 30² • π

Explanation:

Step1: Find radius from diameter

Radius $r = \frac{\text{diameter}}{2} = \frac{30}{2} = 15$ meters.

Step2: Apply area formula

Area of circle: $A = \pi r^2 = \pi \cdot 15^2$.

Answer:

B. $15^2 \cdot \pi$