Given a circle with the radius of 9.42ft. Find the circumference of this circle. Take π as 3.14.
The picture below shows the circle with the diameter d.
To find the diameter of the circle, we start with the formula for the circumference of a circle:
Since the value of the circumference is given as 9.24ft, we can substitute C with 9.24. Similarly, we can substitute π with 3.14. This is shown below:
Now, we have 3.14d = 9.24. To find d, we need to remove 3.14. To do so, we divide both sides of the equation with 3.14 as shown below:
Now, the calculated number has no meaning unless we include the unit for it. Since the circumference is in feet, the diameter will also be in feet. Hence:
Therefore, the answer is A.
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