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(1) 4x6 =24 cm
(2) 8x4+6×4+5x4=32+24+20=76cm
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LSA of cube = 4a²
= 4(4)²
= 4 × 16
= 64
TSA of cube = 6a²
= 6(4)²
= 6 × 16
= 96
TSA of cuboid = 2(lb+bh+hl)
= 2 { (8×6) + (6×5) + (8×5)}
= 2 ( 48 + 30 + 40 )
= 2 × 118
= 236
LSA of cuboid = 2 ( l + b ) h
= 2 ( 8 + 6 ) × 5
= 2 × 14 × 5
= 140
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