Question

Find the area of the circle of radius, 8.4cm.

Answer 1

Answer:

area of the circle=2πr

=2×22/7×8.4cm

=2× 22/7×84/10

= 2×11×12/5

= 22×12/5

= 52.8cm square.

hope it helps

Answer 2

Answer:

Area of circle is 221.76 ${cm}^{2}$

Step-by-step explanation:

Given -

Radius of circle is 8.4 cm

To find -

The Area of circle

Solution -

As we know that,

Area of circle = $\pi {r}^{2}$

Where, r is radius of circle

Put the value of r we get

Area of circle = $\pi \times {8.4}^{2}$

Square means multiply the given values with itself twice.

${8.4}^{2} = 8.4 \times 8.4 = 70.56$

Square of 8.4 is 70.56

Area of circle = $\pi \times 70.56$

The value of π is $\frac{22}{7}$

Area of circle = $\frac{22}{7} \times 70.56$

Area of circle = 221.76

Hence,

Area of circle is 221.76 ${cm}^{2}$