Not enough information. The lake's area will depend a lot on its exact shape - for the same perimeter you can get different areas.
Norris Lake, TN has 33,840 acres of water surface and approximately 809 miles of shoreline.
I own a boat on Lake Michigan, and am certainly a "numbers guy." Lake Michigan and lakes of this size are so huge that they are measured not in acres, but typically in square miles. The Lake is 22,400 square miles which translates to 14,336,000 acreas of surface area. 5th largest lake in the world.
Lake Ontario's surface area covers 4,825,600 acres.
Lake Hartwell is actually a reservoir with a surface area of 56,000 acres and a shoreline of 962 miles
Since it is a flood control reservoir it varies from 2,890 acres to 5,795 acres or about nine square miles when it is at capacity.
Utah Lake covers an area of 95,000 acres. This lake is a freshwater lake and measures 24 miles in length and 13 miles in width.
20 acres = 0.03125 square miles.
Lake Minnetonka in Minnesota has a shoreline that measures approximately 125 miles around. This extensive shoreline encompasses several bays and islands, contributing to its popularity for recreational activities. The lake covers around 14,528 acres, making it one of the largest lakes in the state.
The lake is about 2,560 acres.
Kentucky Lake with 160,000 acres lead the state in area however Cumberland Lake has a greater volume.
Lake Chatuge comprises about 7000 acres flooded and has approximately 132 miles of shoreline.
It is approximately 68 miles around Mille Lacs Lake.