Answer to December 2010 Problem
Whiskeytown Lake Problem

Whiskeytown Lake in Whiskeytown National Recreation Area in California has a 36 mile shoreline and a surface area of 3,200 acres.
If the lake were circular, what would be the area if it had a circumference of 36 miles?
(Give your answer in acres).

Solution to the Problem:

The answer is 66,004 acres.

C = pi * d
36 miles = pi * d
18 / pi = r
So, r = 5.7296 miles = 30,252 feet
A = 2,875,166,387 square feet
Since there are 43,560 square feet in an acre,
A = 66,004 acres.

Correctly solved by:

1. Steven R. Muller Clear Brook, Virginia
2. Victoria Johnson Mountain View High School,
Mountain View, Wyoming
3. Jacob Harmon Mountain View High School,
Mountain View, Wyoming
4. Josey Pitts Mountain View High School,
Mountain View, Wyoming
5. David & Judy Dixon Bennettsville, South Carolina
6. John Funk Ventura, California