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Problem 390

The ratio of the areas of two circles is \(9: 4\). The length of the radius of the larger circle is how many times greater than the length of the radius of the smaller circle?

Expert verified

So, the length of the radius of the larger circle is \(\frac{3}{2}\) times greater than the length of the radius of the smaller circle.

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Chapter 20

A 1 -acre field in the shape of a right triangle has a post at the midpoint of each side. A sheep is tethered to each of the side posts and a goat to the post on the hypotenuse. The ropes are just long enough to let each animal reach the two adjacent vertices. What Is the total area the two sheep have to themselves, i.e., the area the goat cannot reach?

Chapter 20

Find the area of a circle whose radius is 7 in. [Use \(\pi=22 / 7]\).

Chapter 20

The ratio of the area of two circles is \(16: 1\). If the diameter of the smaller circle is 3 , find the diameter of the larger circle.

Chapter 20

The lengths of the radii of two circles are in the ratio of \(1: 4\). Find the ratio of the areas of the circles.

Chapter 20

If the circumference of a circle is \(88 \mathrm{ft}\)., find the area of the circle. [Use \(\pi=22 / 7 .]\)

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