A metal of cuboid dimensions 22×15×7.5cm was melted and cast in to cylinder of height 14cm.what it's radius ?
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volume of cuboidal metal = 22*15*7.5 = 2475 cm3 it is melted and recast into a cylinder so Volume of cylinder = volume of cuboid = 2475 cm3 πr2h = 2475 (22/7)r2*14 = 2475 r2 = 56.25 r = 7.5 cm
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