Question

the diameter of a solid shpere is 18 cm find its volume​

Answer 1

Answer:

It is given that

Diameter of the sphere = 18cm

Radius of the sphere = 18/2 = 9cm

Length of the wire = 108m = 10800 cm

We know that

πr2h = 4/3 πr3

By substituting the values

(22/7) × r2 × 10800 = 4/3 × (22/7) × 93

On further calculation

r2 = (4/3 × (22/7) × 729)/ ((22/7) × 10800)

So we get

r2 = (4 × 243)/ 10800 = 9/100

By taking square root on the RHS

r = 3/10 = 0.3 cm

Diameter = 2 (0.3) = 0.6 cm

Therefore, the diameter of the wire is 0.6cm.

Answer 2

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• Given :-

Diameter = 18 cm

Radius = (18/2)

Radius = 9 cm

Formulae of volume of sphere = (4/3) π r^3

Volume = 4/3 × 22/ 7 × 9 × 9 × 9

Volume = 3,054.85 cm^3

Hope it helps✌