Question

find the radius of the circle if its area is 1.54 km

Answer 1

Answer:

Radius is 0.7 km = 700 m

Step-by-step explanation:

Area = pi r^2

1.54 = 22/7 * r^2

r^2 = 1.54 * 7 /22 = 0.49

Therefore r = 0.7 km = 700 m

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Answer 2

Given,
Area of the circle = pi r²

$= > \pi {r}^{2} = 1.54 {km}^{2} \\ = > {r}^{2} = \frac{1.54 \times 7}{22} \\ = > r = \sqrt{ \frac{154 \times 7}{22 \times 100} } \\ = > r = \sqrt{0.49} \\ = > r = 0.7km\\=>r = 700m.$

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