Question

The dimension of cuboid are 44 cm×42 cm× 21cm. It is molten and recast into sphere. Find the total surface area of the cylinder

Answer 1

hey mate here is the answer ,!!

lbh= volume of cuboid

44.42.21 = volume

volume = 38808cm³

now molten and recreated in to sphere

now volume of sphere = 4/3πr³

4/3πr³=38808

πr³=29106

r³=9261

r= 21cm

now , TSA of sphere = 4πr² = 4×22/7×441 = 5544 cm²

hope that helps ,,!!

@ himanshu jha

Answer 2

here dimensions are 44×42×21cm³
volume is = 38808 cm³

when it turns into sphere
volume remains same
i.e. 4/3πr³ = 38808
r³ = 29106/π
r = (29106/π)⅓

total surface area = 4πr²
= 4π(29106/π)⅔
= 4×22/7×(9261)⅔
= 88/7×441
= 88×63
=5544cm²

hope it helps you
@di