Question

A hot water system ( geyser) consists of a cylindrical pipe of length 14cm and diameter 5cm. find the total radiating surface of hot water system

Answer 1

here total radiating surface stands for the surface we can see . So simply you find the C.S.A of cylinder

Answer 2

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✴.Radius[R] = $\frac{diameter}{2} ={5}{2}$ =2.5Cm.

Length of the pipe = height =14m

Radiating surface = 2${\phi}$ rh

2${\phi}$ $\frac{22}{7}$ × 2.5 × 1400

=22000${cm}^3$

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