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Firlakuza [10]
2 years ago
15

A drink coaster in the shape of a circle has

Mathematics
1 answer:
egoroff_w [7]2 years ago
5 0

The diameter of the coaster is 5 cm.

Step-by-step 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) = πr^{2} sq cm

According to the problem,

πr^{2}  = 19.63

or, r^{2} = \frac{7 X 19.63}{22}

= 6.2459

or, r = \sqrt{6.2459} = 2.499 (approx)

= 2.5 cm

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

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