a train leaves a station and travels north at a speed of 105mph. two hours later, a second train leaves on a parallel track and
1 answer:
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The answer is C. You can make a rectangle by putting the diagonals through the center anywhere, but if you want a square, you have to put the two diagonals perpendicular to each other and join their ends. See the diagram.
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.