Question

What is the best approximation for the area of a circle with a diameter of 19 meters?
Use 3.14 to approximate pi.


29.8 m²

59.7 m²

283.4 m²

889.9 m²

Answer 1

Radius of the circle = 19/2 m

Area = πr^2
= 3.14 × [(19/2)×(19/2)]
= 3.14 × 361/4
= 1133.54/4
= 283.385
~ 283.4 m sq
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Answer 2

The answer to this question is (c) 283.4 $m^{2}$, because
d=19 m
∴ r=($\frac{19}{2}$)m
∴ Area of circle = $\pi$$r^{2}$
                         = 3.14 x ($\frac{19}{2}$)²
                         = $^ \frac{314}{100}$ x 90.25
                         = $\frac{314}{100}$ x $\frac{9025}{100}$
                         = 283.4$m^{2}$