An iron pipe 10 cm long has a diameter equal to 7 cm. Find the total surface area of the pipe.

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Solution

Pipe is an open cylinder, r= 7/2
∴ Total surface area =2πrh
=2×22/7×7/2×10 cm2
=220cm²

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An iron pipe 10 cm long has a diameter equal to 7 cm. Find the total surface area of the pipe.

Pipe is an open cylinder, r= 7/2∴ Total surface area =2πrh =2×22/7×7/2×10 cm2 =220cm2

Pipe is an open cylinder, r= 7/2
∴ Total surface area =2πrh
=2×22/7×7/2×10 cm2
=220cm²