Page 81 - WCS - Electrical
P. 81
WORKSHOP CALCULATION & SCIENCE - CITS
l = length, b = breadth and h = height
Cylinder
This is a prism whose top and bottom surfaces are equal and circular.
Volume of cylinder = r²h or d²h
Curved area of cylinder = 2 rh unit²
Total surface area of cylinder = 2 r(h+r) unit²
r = Radius of base , d = Diameter of base
h = Height of cylinder
Hollow cylinder
Hollow means empty space. In hollow cylinder there is an empty place. Water pipe is an example of hollow
cylinder.
Volume of hollow cylinder = (R² - r²) h (or)
= (R + r) (R - r) h (or)
= (D² - d²) h unit³
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CITS : WCS - Electrical - Exercise 6
