Question

Acircular pipe is 30 cm long. Its internal and external diameters
are 5 cm and 6 cm respectively. Find the volume of material used in
making the pipe. Also find the total surface area of the pipe.​

Answer 1

V= πr²h = 3.14×5×5×30 = 2,355 cm³

TSA = 2πr(h+r) = 2×3.14×6×(6+30)

TSA = 6.28 × 6 × 36 = 1,356.48

= 1,356.5 cm²

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