Question

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.​

Answer 1

Answer:

• Indian fig tree, Ficus bengalensis, whose branches root themselves like new trees over a large area. The roots then give rise to more trunks and branches. Because of this characteristic and its longevity, this tree is considered immortal and is an integral part of the myths and legends of India.

Answer 2

Solution

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Correct option is

D

44039.28cm

2

Diameter = 5 cm

Radius = Diameter ÷2=5cm÷2=2.5cm

length of pipe =28m=2800cm

Total Radiating Surface of pipe = Curved surface area + 2 × Area of circular crossection

=2πrh+2πr

2

=2πr(h+r)=2×

7

22

×2.5(2800+2.5)=44039.28cm

2