Question

A metal sheet 27cm long, 8cm broad, 1cm thick is melted into a cube. what is the difference between surface areas of two solids?

Answer 1

Volume of sheet = volume of cube
First we will calculate volume of metal sheet =l X b x h
= 27 x8 x1=216cm^3
So volume of the cube is also 216 cm^3
216=a^3
$a = \sqrt[3]{216} = 6$
So surface area of sheet = 2(lb+bh+hl)
=2(27x8+8x1+1x27)
=502cm^2
And surface area of cube
=6a^2
=6 x6^2=216cm^2
Difference between surface area = 502-216=286cm^2

Answer 2

Step-by-step explanation:

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