1.

A cuboidal metal Plate of 1cm thickness, 9cm breath and 81 cm length is melted into a cube then find the total surface area of the cube

Answer»

Vol of cuboid=l*b*h=1*9*81=729cm3
Vol. of cube=vol. of cuboid....
a3=l*b*h
729=a3
a=9cm....
Now SA=6*a2
=6*9*9=81*6=486cm2



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