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Question

The centre point of a circle is at 15 cm distance from circumference of the circle. What is length of diameter of the circle?

A
15 cm
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B
30 cm
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C
7.5 cm
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D
35 cm
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Solution

The correct option is B 30 cm
Radius of circle is distance between the centre point and circumference of a circle.
Hence, Radius of circle =15 cm
Let's draw a circle of given radius.

Radius = AC = BC = 15cm

Diameter of a circle is twice the radius of the circle.
Hence, Diameter =2× radius
Diameter = AB =2×15=30 cm

Option (b) is correct.

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