Question
Download Solution PDFA closed cylindrical tank of radius 1.5 m and height 3 m is made from a sheet of metal, how much sheet of metal is required to do it?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
Radius (r) = 1.5 m
Height (h) = 3 m
Formula used:
Surface area of a closed cylindrical tank = 2πrh + 2πr2
Calculation:
Surface area = 2π × 1.5 × 3 + 2π × (1.5)2
⇒ Surface area = 2π × 4.5 + 2π × 2.25
⇒ Surface area = 9π + 4.5π
⇒ Surface area = 13.5π
⇒ Surface area = 13.5 × 22/7
⇒ Surface area = 42.42 square metre
∴ The correct answer is option 1.
Last updated on May 28, 2025
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