Circle — The radius is 3 cm. Find the diameter.
Aptitude
Area
Difficulty: Easy
Choose an option
-
A6 cm
-
B12 cm
-
C1.5 cm
-
D8 cm
-
E9 cm
Answer
Correct Answer: 6 cm
Explanation
Introduction / Context:Diameter is twice the radius. This is a direct one-step geometry fact used frequently in circle problems.
Given Data / Assumptions:
- r = 3 cm
Concept / Approach:d = 2 * r.
Step-by-Step Solution:d = 2 * 3 = 6 cm
Verification / Alternative check:None needed beyond the definition.
Why Other Options Are Wrong:12 cm doubles twice; 1.5 cm is half the radius; 8 and 9 cm are unrelated.
Common Pitfalls:Mixing up radius and diameter roles.
Final Answer:6 cm