Question

Two cubes each of volume 125cm are joined together end to end find the surface area of resulting Cuboid

Answer 1

volume of the cube =a^3
=125=a^3
=a=
$\sqrt[3]{125}$
a=5
therefore the CSA of 1 cube
=4a^2
=4×5^2
=4×25
=100
CSA of both the cubes=100×2
=200
the area of the side panes=2a^2
=2×5^2
=2×25
=50
hence the area of the total cuboid formed =200+50
=250cm^2