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nick claus plans to have a model train running in a circle around his holiday tree.how many feet of track will he need if the diameter of the circle is 9.5ft? round to the nearest whole number.
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nick claus plans to have a model train running in a circle around his holiday tree.how many feet of track will he need if the diameter of the circle is 9.5ft? round to the nearest whole number.

User Chetan Kothari
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1 Answer

5 votes
We need to find ut the perimeter of a circle. The formula is:

P = 2*r* \pi
Where:
r = radius = diameter / 2

We can insert numbers into formula to calculate:

P = 2* (d)/(2) * \pi \\ P=d* \pi \\ P=9.5* \pi \\ P=29.85

Nick will need 30 feet of track.
User Phoenixwizard
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