Area of a circle with diameter ‘m’ radius ‘n’ and circumference ‘p’ is
(a) 2πn
(b) πm²
(c) πp²
(d) πn²

Solution:

Given, diameter of circle is m

Radius of circle is n

Circumference of the circle is p.

We have to find the area of a circle

Area of circle = πr²

Where, r is the radius of circle

Given, r = n

= π(n)²

Therefore, area of circle = πn²

✦ Try This: Area of a circle with diameter ‘i’ radius ‘k’ and circumference ‘o’ is

Given, diameter of circle is i

Radius of circle is k

Circumference of the circle is o.

We have to find the area of a circle

Area of circle = πr²

Where, r is the radius of circle

Given, r = k

= π(k)²

Therefore, area of circle = πk²

☛ Also Check: NCERT Solutions for Class 7 Maths Chapter 11

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NCERT Exemplar Class 7 Maths Chapter 9 Problem 23

Area of a circle with diameter ‘m’ radius ‘n’ and circumference ‘p’ is (a) 2πn, (b) πm², (c) πp², (d) πn²

Summary:

Area of a circle with diameter ‘m’ radius ‘n’ and circumference ‘p’ is πn²

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☛ Related Questions:

• A table top is semicircular in shape with diameter 2.8 m. Area of this table top is (a) 3.08 m², (b) . . . .
• If 1m² = x mm² , then the value of x is (a) 1000, (b) 10000, (c) 100000, (d) 1000000
• If p squares of each side 1mm makes a square of side 1cm, then p is equal to (a) 10, (b) 100, (c) 10 . . . .