Robert climbed 775 steps in 12 1/2 minutes
2 answers:
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To solve this we are going to use the formula for the area of a circle: 
where
is the area of the circle
is the diameter of the circle
We know from our problem that the area of our circle is 10 inches long, so
. Lets replace that value in our formula to find :
We can conclude that the correct answer is: 78.54 square inches, or in centimeters: 506.7 square cm.
where
We know from our problem that the area of our circle is 10 inches long, so
We can conclude that the correct answer is: 78.54 square inches, or in centimeters: 506.7 square cm.