a metal pipe is 77cm long the inner diameter of a cross section is 4 cm the outer diameter being 4.4 CM find tis : (1) inner curved surface area. (2) outer curved surface area. (3) total surface area.
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Answer:
- 308cm
- 338.8cm
- 646.8cm
Explanation :
length = 77cm
inner diameter of a cross section = 4cm
- Total inner curved surface area of metal pipe = 77 × 4
= 308cm
outer diameter of a cross section = 4.4cm
- Total outer curved surface area of metal pipe = 77 × 4.4
= 338.8cm
- Total surface area of metal pipe
= 308cm + 338.8cm
= 646.8cm
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