What is group A called? What is group B called ?
1 answer:
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Given:
Diameter of the hole = 30 cm
To find:
The area of the hole.
Solution:
The radius of a circle is always half of the diameter. It is given that the diameter of the hole is 30 cm. So, the radius of the hole is:
Area of a circle is:
Putting and
in the above formula, we get
Therefore, the area of the hold is 706.5 square cm.