The semi-perimeter (Length + Breadth) is 3 units at ratio 2:1. Find 1 unit, then compute Length, Breadth, and Area.<br><br>[[model:questions/solutions/q4510.png]]<br><br>• Semi-perimeter → 60 ÷ 2 = 30 cm (Length + Breadth)<br>• Total units → 2 + 1 = 3<br>• 1 unit → 30 ÷ 3 = 10 cm<br>• Breadth = 1u → 10 cm; Length = 2u → 20 cm<br>• Area → 20 × 10 = 200 cm&sup2;<br><br>The area is 200 cm&sup2;.<br>Check: 2 × (20 + 10) = 60 cm. ✓