Page 87 - WCS - Electrical
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WORKSHOP CALCULATION & SCIENCE - CITS
22
= x 7.5 x 7.5 x 100
7
= 17678.57 cm³
Gas contain in 1 cm³ = 120 cm³ of gas
Gas contain in 17678.57 cm³ = 17678.57 x 120
= 2121428 cm³
Volume of oxygen = 2121428 cc.
Sphere
Sphere is a solid circular body.
4
Volume of sphere = r³ or
3
= d³ unit³
6
Total surface area of sphere = 4 r² unit²
Where r = Radius of sphere
d = Diametre of sphere
1
Radius = of diameter
2
1 Find the volume and surface area of a sphere of 3 cm radius.
4
V = r³ unit³
3
4 x 22 x 3 x 3 x 3
=
3 x 7
= 113.1 cm³
Total Surface Area = 4 r² unit²
22
= 4 x x 3 x 3
7
= 113.1 cm²
2 Find the diameter of sphere having volume of 15625 cc.
4
r³ = Volume
3
74
CITS : WCS - Electrical - Exercise 6
