plss answer plsss answer question iv .v . vi explanation also write
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Step-by-step explanation:
total surface area of a cuboid (tsa) = 2(lb + bh + lh)
1. l = 5cm, b = 4cm and h= 3cm
tsa= 2(5×4 +4×3 + 5×3)
= 2(20+12+15) = 2 × 47 = 94cm²
2. l=6, b=3 and h=2
tsa= 2(6×3+3×2+6×2)
= 2(18+6+12) = 2 × 36 = 72cm²
3. l=10, b=8 and h=5
tsa= 2(10×8+8×5+10×5)
= 2(80+40+50) = 2 ×170 = 340cm²
4. l= 4, b= 1.7 and h=2.3
tsa= 2(4×1.7+1.7×2.3+4×2.3)
= 2(6.8 + 3.91 + 9.2) = 2 × 19.91 =39.82cm²
5. l = 5 1/2 = 5.5cm
b = 4cm
h = 10 1/2 = 10.5cm
tsa= 2(5.5 ×4 +4×10.5+5.5×10.5)
= 2(22+42+57.75) = 2 ×121.75 = 243.5cm²
6. l= 16cm, b=8cm and h=6cm
tsa = 2(16×8+8×6+16×60
= 2(128 + 48 + 960) = 2 ×1136= 2,272cm²
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