Que4 A metal pipe is 77 cm long. The inner
ft diameter of a cross section is 4 cm, the
outer diameter being 4.4 cm. Find its
() inner curved surface area.
(ii) outer curved surface area.
(iii) total surface area.
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Answer:
outer curved surface area
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Inner Radius of Cylinder pipe=r1 =
Inner diameter/2 =(4/2)cm =2cm
Height(h) of Cylinder pipe =77cm
Curved Surface Area of inner surface of
pipe =2 π r ₁h =(2 ×22/7 ×77)cm ²
=968 cm ²
Inner diameter/2 =(4/2)cm =2cm
Height(h) of Cylinder pipe =77cm
Curved Surface Area of inner surface of
pipe =2 π r ₁h =(2 ×22/7 ×77)cm ²
=968 cm ²
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