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Q.

What’s the area of a circle whose radius is 7 units?


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a

42π unit2

b

49π unit2

c

54π unit2

d

60π unit2 

answer is B.

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Detailed Solution

We have been given the radius of a circle is 7 units.
We know, the area of the circle is calculated by,
Area of a circle =πr2, where r is the radius of the circle
Substituting the value in the formula,
⇒ πr2
⇒π×7×7
⇒49π unit2
Therefore, the area of the circle is 49π unit2.
Hence, option 2 is correct.
 
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