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A solid piece of iron is …

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A solid piece of iron is the form of a cuboid of dimension 4.4 m× 2.6m× 10m is melted to form a hollow cylinder of internal radius 30 cm and thickness 5 cm . Find the length of the pipe

Posted by Hitesh Jaiswal 5 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Vijay Rathore??? 5 years, 11 months ago

The vol. Of cuboid = vol. of cylinder l×b×h = πr²h 4•4×2•6×10 m=11440 cm³.......(1) Internal radius= 30 cm Thickness = 5cm Outer radius = 35cm Vol.=πr²h=22/7×35×35× h By(1) 22/7×35×35×h=11440 h=. 11440×7÷22×35×35 h=11440÷22×35×5 h=2•91cm

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CBSE > Class 10 > Mathematics