find total surface area of an open pipe of length 50 cm, external diameter 20cm and internal diameter 6cm.
Answers
Answered by
8
Answer:
Given, a pipe with inner diameter 6 cm, outer diameter 20 cm, length 50 cm.
Inner diameter =6 cm, inner radius =3 cm ( Diameter =2 × radius)
Outer diameter=20 cm, outer radius =10 cm
Total surface area of pipe = Curved surface area of inner pipe + curved surface area of outer pipe + Area of top circular portion
=2πrh+2πRh+2π (R^2 - r ^ 2)
= 2 × 22/7 × 3 × 50 + 2 × 22/7 × 10 × 50 + 2 × 22/7 ×91
=942.85+3142.85+572
=4657.7 cm2
Hope this is helpful for you.
Similar questions