A circular track has an area of 4,900yd2. Alex ran around the whole track three times. How many yards did Alex run, to the nearest hundredth of a yard?
Q. A circular track has an area of 4,900yd2. Alex ran around the whole track three times. How many yards did Alex run, to the nearest hundredth of a yard?
Circle Area Formula: Determine the formula for the area of a circle.The area of a circle is given by the formula A=πr2, where A is the area and r is the radius of the circle.
Radius Calculation: Solve for the radius of the circular track using the given area.We are given that the area A=4,900 square yards. We can rearrange the formula to solve for r:r=πA
Radius Calculation Result: Calculate the radius of the circular track.r=π4,900r≈3.141594,900r≈1,560.79r≈39.50 yards
Circle Circumference Formula: Determine the formula for the circumference of a circle.The circumference C of a circle is given by the formula C=2πr, where C is the circumference and r is the radius of the circle.
Circumference Calculation: Calculate the circumference of the circular track using the radius.C=2πrC≈2×3.14159×39.50C≈248.05 yards
Total Distance Calculation: Calculate the total distance Alex ran.Since Alex ran around the track three times, the total distance D he ran is:D=3×CD≈3×248.05D≈744.15 yards
Total Distance Rounding: Round the total distance to the nearest hundredth of a yard. D≈744.15 yards (This value is already to the nearest hundredth of a yard, so no further rounding is necessary.)
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