Page 32 - CITS - WCS - Mechanical

WORKSHOP CALCULATION - CITS

T.S.A = 6a² unit
= 6 x 4.5 x 4.5
= 121.5 cm²

V = a³ unit³
= 4.5 x 4.5 x 4.5
= 91.125 cc.
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
4
3 22
x x r³ = 15625
7
15625 x 3 x 7
r³ =
4 x 22
328125
=
88
= 3728.69
3
r = 3728.69
= 15.51 cm
diameter = 2 x radius

= 2 x 15.51
= 31.02 cm
.

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CITS : WCS - Mechanical - Exercise 5 CITS : WCS - Mechanical - Exercise 5