Question: What is the length of the radius of a circle if the area is 50π square units?

Options:

1. 5 units
2. 10 units
3. 25 units
4. 50 units

Correct Answer: 10 units

Solution:

Area of a circle = πr². Setting 50π = πr² gives r² = 50, so r = √50 = 5√2 ≈ 7.07 units.