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Round 1 km to the nearest tenth

Round 1 km to the nearest tenth
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2 votes
Round 1 km to the nearest tenth

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User Corey Ogburn
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7.8k points

1 Answer

5 votes

We are required to find the area of a circle to the nearest tenth


\text{Area of a circle = }\pi* r^2
\begin{gathered} \pi=3.14 \\ r=\text{ }(diameter)/(2) \\ \text{diameter = 1km} \\ r=(1)/(2)=\text{ 0.5km} \end{gathered}
\begin{gathered} \text{Area of given circle via substitution hence =} \\ 3.14*0.5^2=0.785km^2 \\ \text{Area of the circle hence}\approx0.8\operatorname{km}\text{ to the nearest tenth} \end{gathered}

Answer is option D

answered
User Bagusflyer
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9.5k points
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