Question

A drink coaster in the shape of a circle has

an area of 19.63 square inches. Find the
diameter of the coaster.

Answer 1

Explanation:

ANSWER 5

Answer 2

The diameter of the coaster is 5 cm.

Explanation:

Given,

The area of the circle = 19.63 sq inch

To find the diameter, we need to find the radius

Formula

The area of a circle with radius(r) = π
`r^(2)` sq cm

According to the problem,

π
`r^(2)` = 19.63

or,
`r^(2)` =
`(7 X 19.63)/(22)`

= 6.2459

or, r =
`√(6.2459)` = 2.499 (approx)

= 2.5 cm

Hence the diameter of the circle = 2 × 2.5 cm = 5 cm