Question

Answer this please
Don't spam

Answer 1

Volume of cuboid (V)=abc.

Surface area of cuboid(S)=2 (ab+bc+ca).

On dividing these two,we get,

S/V=2 (ab+bc+ca)/abc

=2 (ab/abc+bc/abc+ca/abc)

=>S/V=2 (1/c+1/a+1/b)

Therefore,

1/V=2/S (1/a+1/b+1/c).

Hence,proved.