A matal pipe is 77cm. long . the 8nner diameter of a cross section is 4cm.the outer diameter begins.4cm(see figure)find its
(1)inner curved surface area
(2)outer curved surface area
(3)total surface area
aiarierra
Answers
Answered by
2
Step-by-step explanation:
As the inner and outer diameter is the same
the inner and outer curved surface area will be the same
outer surface area = 2πrh
= 2 × 3.14 × 4 × 77
= 1934.24 cm²
total surface area = 2πrh+ 2πr²
= 1934.24 + 2 ×3.14× 4²
= 1934.24 + 100.48
= 2034.72 cm² ✓
Similar questions