Question

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Answer 1

Ltrap = ½ × (20+35) × 14
= 385 cm²

L½lingbsr = ½ × π × r²
= ½ × 3,14 × 10²
= 157 cm²

L½lingkcl = ½ × π × r²
= ½ × 22/7 × 7²
= 77 cm²

L seluruhnya = 385 + 157 + 77
= 619 cm²