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24 Mar 2020, 01:18
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
100% (00:26) correct
0%
(00:00)
wrong
based on 33
sessions
History
Date
Time
Result
Not Attempted Yet
If a circle’s circumference is \(10π\) centimeters long, what is the area of the circle, in square centimeters?
(A) \(12.5\)
(B) \(5π\)
(C) \(22.5\)
(D) \(25π\)
(E) \(10π\)
(A) \(12.5\)
(B) \(5π\)
(C) \(22.5\)
(D) \(25π\)
(E) \(10π\)
26 Mar 2020, 03:59
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We know:
Circumference = Distance (d) x π = 10π
Radius = Distance / 2 = 10/2 = 5
Area = A = π x r^2 = π x 5^2 = 25π
Correct Answer:
D
Circumference = Distance (d) x π = 10π
Radius = Distance / 2 = 10/2 = 5
Area = A = π x r^2 = π x 5^2 = 25π
Correct Answer:
D
26 Mar 2020, 10:49
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Solution
Given
In this question, we are given that
- • A circle’s circumference is \(10π\) centimeters long
To find
We need to determine
- • The area of the circle, in square centimeters
Approach and Working out
If we assume the radius of the circle to be R cm, then we can write
- • \(2πR = 10π\)
Or, \(R = 5\) cm
Hence, the area of the circle = \(πR^2 = π(5)^2 = 25π\) square cm
Thus, option D is the correct answer.
Correct Answer: Option D
