a metal pipe is 77 cm long the inner diameter of a cross section is 4 centimetre outer diameter is being 4.4 cm find the total surface area
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Heya !!!
Height of metallic pipe (H) = 77 cm
Diameter of metallic pipe (D) = 4 cm
Internal radius (r)= D/2 = 4/2 = 2 cm
External diameter of metallic pipe = 4.4 cm
Radius (R) = D/2 => 4.4/2 = 2.2 cm
Therefore,
TSA of metallic pipe = 2π ( R+r) ( H + R -r)
=> 2 × 22/7 × ( 2.2 + 2) ( 77 + 2.2 - 2)
=> 44/7 × (4.2) × ( 77 + 0.2)
=> 44/7 × 4.2 × 77.2
=> 14266.56/7
=> 2038.08 cm².
HOPE IT WILL HELP YOU..... :-)
Height of metallic pipe (H) = 77 cm
Diameter of metallic pipe (D) = 4 cm
Internal radius (r)= D/2 = 4/2 = 2 cm
External diameter of metallic pipe = 4.4 cm
Radius (R) = D/2 => 4.4/2 = 2.2 cm
Therefore,
TSA of metallic pipe = 2π ( R+r) ( H + R -r)
=> 2 × 22/7 × ( 2.2 + 2) ( 77 + 2.2 - 2)
=> 44/7 × (4.2) × ( 77 + 0.2)
=> 44/7 × 4.2 × 77.2
=> 14266.56/7
=> 2038.08 cm².
HOPE IT WILL HELP YOU..... :-)
the total surface area =the inner curved surface area +the outer curved surface area +2×22/7×(r1)2 +(r2)2
=2038.08
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