Henry Ernest Dudeney/Puzzles and Curious Problems/202 - A Garden Puzzle

Puzzles and Curious Problems by Henry Ernest Dudeney: $202$

A Garden Puzzle

The four sides of a garden are known to be $20$, $16$, $12$ and $10$ rods,

and it has the greatest possible area for these sides.

What is the area?

Sources

• 1932: Henry Ernest Dudeney: Puzzles and Curious Problems ... (previous) ... (next): Geometrical Problems: Various Geometrical Puzzles: $202$. -- A Garden Puzzle
• 1968: Henry Ernest Dudeney: 536 Puzzles & Curious Problems ... (previous) ... (next): Geometrical Problems: Triangle, Square & Other Polygon Puzzles: $268$. A Garden Puzzle