Rectangle with breadth as a percent of length:\nThe breadth of a rectangle equals 60% of its length. If the perimeter is 800 m, find the area (in sq. m) of the field.

Introduction / Context:
Linking perimeter to dimensions is standard: perimeter fixes the sum of length and breadth. Given a percentage relation between breadth and length, we can solve for both and compute area.

Given Data / Assumptions:

• B = 0.60L.
• Perimeter P = 800 m ⇒ 2(L + B) = 800.
• Area A = L * B.

Concept / Approach:
Use the perimeter equation to find L + B, substitute B = 0.60L, solve for L, then compute B and multiply to obtain area.

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