The total surface area of a cuboid of length 90 cm, breadth 50 cm and height 4 m is:
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Correct answer: D
Explanation
The correct answer is option 4 i.e. 12.1 m2
Given:
Length = 90 cm = 90/100 = 0.9 m
Breadth = 50 cm = 50/100 = 0.5 m
Height = 4m
Concept Used:
Total surface are of cuboid = 2(lb + bh + hl) ....(i)
Explanation:
According to the given question,
Total surface area of cuboid = 2(0.9 × 0.5 + 0.5 × 4 + 4 × 0.9) {using equation (i)}
⇒ TSA = 2( 0.45 + 2.0 + 3.6)
⇒ TSA = 2 × 6.05
⇒ TSA = 12.1
Hence the required total surface area of cuboid is 12.1 m2.