Question

Round to the nearest tenth. Use 3.14 or 22/7 for π.​

Answer 1

Note: Consider we need to find the circumference and area of the given circle.

Given:

A circle with radius 7.1 m.

To find:

The circumference and area of the given circle.

Solution:

Circumference of a circle is:

$C=2\pi r$

Putting $r=7.1,\pi=3.14$, we get

$C=2(3.14)(7.1)$

$C=44.588$

$C\approx 44.6$

Therefore, the circumference of the circle is 44.6 m.

The area of the circle is:

$A=\pi r^2$

Putting $r=7.1,\pi=3.14$, we get

$A=3.14(7.1)^2$

$A=158.2874$

$A\approx 158.3$

Therefore, the area of the circle is 158.3 sq. m.