A metal cuboid of dimension 22cm*15cm*7.5cm was melted and cast into cylinder of height 14cm.What is its radius
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Answer:
volume of cuboid = volume of cylinder
l*b*h = πr^2 h
22*15*7.5 = 22/7*r^2*14
2475 = 44 *r^2
r^2 = 2475/44
r = √ 56.25
so..,.. r = 7.5
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