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= 16 × 16 ×5
= 1280 cm²
L2 = (a × t ÷ 2) × 4
= (16 × t ÷ 2) × 4
t = √10² - 8²
= √100 - 64
= √36
t = 6
L2 = (16 × 6 ÷ 2) ×4
= 192 cm²
L = L1 + L2
= 1280 cm² + 192 cm²
= C. 1472 cm²