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Sahay Sir > Question Answers > NCERT Class 9 > Maths > Chapter 13 - Surface Areas and Volumes > 3. A metal pipe is 77 cm long. The inner diameter of a cross section is 4 cm, the outer diameter being 4.4cm. (see fig. 13.11). Find its (i) inner curved surface area, (ii) outer curved surface area (iii) total surface area

3. A metal pipe is 77 cm long. The inner diameter of a cross section is 4 cm, the outer diameter being 4.4cm. (see fig. 13.11). Find its (i) inner curved surface area, (ii) outer curved surface area (iii) total surface area

(ii) outer curved surface area (iii) total surface area 3. A metal pipe is 77 cm long. The inner diameter of a cross section is 4 cm the outer diameter being 4.4cm. (see fig. 13.11). Find its (i) inner curved surface area