In a hot water heating system, there is ...

In a hot water heating system, there is a cylindrical pipe of length 28 m and diameter 5 cm. Find the total radiating surface in the system. Assume `pi = 22/7` , unless stated otherwise.

A

`6.6 m^2`

B

`5.5 m^2`

C

`4.4 m^2`

D

`3.4 m^2`

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