A solid metallic sphere of diameter 8 cm is melted and drawn into a cylindrical wire of uniform width. If the length of the wire is 12 m, find its width.

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A metallic solid of volume 2200 cm3 is melted and drawn into the form of a wire of height 7 cm. Find the radius of the wire.

The correct option is C 10 cmAssume let the wire is of the shape of the right circular cylinder.∴ Volume of the cylinder = πr2h2200=227×r2×7r2=100r=10cm∴ The radius of the wire is 10 cm.

A metallic solid of volume 2200 $c m^{3}$ is melted and drawn into the form of a wire of height 7 cm. Find the radius of the wire.

The correct option is C 10 cm
Assume let the wire is of the shape of the right circular cylinder.
$∴$ Volume of the cylinder = $π r^{2} h$
$2200 = \frac{22}{7} \times r^{2} \times 7$
$r^{2} = 100$
$r = 10 c m$
$∴$ The radius of the wire is 10 cm.