the radius of a metallic sphere is 9 cm .it was melted to make a wire of diameter 4mm find the length of wire
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Let the radius of sphere be R and radius of wire be r.
V ( sphere) = 4/3 × π × r³
V = 4/3 × π × 9 × 9 × 9
V = 972π
d = 4 mm
r = 2 mm or 0.2 cm
v ( wire ) = π × r² × h
v = (0.2)²πh
Volume of cylinder = Volume of wire
972π = 0.04 π h
h = 972 / 0.04
h = 24300 cm
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