AREA OF CIRCLE:

A= πr²

SOLUTIONS:

1. A circular pool has a radius of 32 cm. Find its

area?

Given:

r= 32cm

Solution:

A = πr²

= 3.14 x (32cm)²

= 3.14 x 1024cm

= 3215.36

2. What is the area of the circle if the diameter is

48 m?

Given:

2 x radius= diameter

= 48/2

r= 24m

Solution:

A= πr²

= 3.14 x (24m)²

= 3.14 x 576m

=1808.64

3. The wheel of the car has a radius of 0.35 m, what is the area?

Given:

r= 0.35m

Solution:

A=πr²

= 3.14 x (0.35m)²

= 3.14 x 0.1225 m

= 0.4 m

4.Find the area of a circle with a diameter of 35.2

cm.

Given:

2 x radius= diameter

= 35.2/2

r=17.6 cm

Solution:

A=πr²

= 3.14 x (17.6cm)²

= 3.14 x 309.76 cm

= 972.65 cm

5. A circle has a circumference of 100 m. Find its

area.

Given:

2 x radius= diameter or circumference of circle

= 100/2

= 50 m

Solution:

A=πr²

= 3.14 x (50m)²

= 3.14 x 2500m

= 7850m

6. The radius of a circle is 9 centimeters. What is

the area?

Given:

r= 9cm

Solution:

A=πr²

= 3.14 x (9cm)²

= 3.14 x 81

= 254.34

7. The diameter of a circle is 12 inches. What is the area?

Given:

2 x radius= diameter

= 12/2

r= 6in

Solution:

A= πr²

=3.14 x (6in)²

= 3.14 x 36in

= 113.04in

8. The radius of a circular rug is 4 feet. What is the area?

Given:

r= 4f

Solution:

A =πr²

= 3.14 x (4f)²

=3.14 x 16f

= 50.24f

9. If the diameter of a circular wall clock is 30 cm,

what is the area of the clock?

Given:

2 x radius= diameter

= 30/2

=15cm

Solution:

A= πr²

= 3.14 x (15cm)²

= 3.14 x 225cm

= 706.5

10. Find the area of a circular pool whose

radius is 2 meters.

Given:

r= 2m

Solution:

A=πr²

= 3.14 x (2m)²

= 3.14 x 4

= 12.56

Step-by-step explanation:

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