Which of the following is/are correct for a circle having diameter of 10 cm?
A
Circumference of a circle is 10π cm
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B
Area of a circle is 25πcm2
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C
Radius is 5 cm
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D
Circumference of a circle is 5π cm
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Solution
The correct option is C Radius is 5 cm Lets draw a circle of diameter 10 cm.
As we know,
Circumference of a circle =πd=π×10=10π cm ⇒ Option(a) is Correct.
Raidus = r = Diameter2=102=5cm ⇒ Option(c) is Correct.
Area of the circle =πr2=π×52=25πcm2 ⇒ Option(b) is Correct.