Question

If the edges of a cube are increased by 2 inches,

A) the volume is increased by 8 cubic inches
B) the area of each face is increased by 4 square inches
C) the diagonal of each face is increased by 2 inches
D) the sum of the edges is increased by 24 inches

Answer 1

please help!

Answer 2

there're 12 edges in a cube.
let edge be, x
then sum of edges (let be, A)= 12x
given, if edge is increased by 2, i.e. x becomes (x+2)
then new sum of edges= 12(x+2)
= 12x + 24
= sum of edges (A) + increment
clearly, option D. is correct.

Answer 3

ooohhhh i see it now. thanks!

Answer 4

cheers!