Question

Three cubes of volume each 125 cubic cm are joined together end to end to form a cuboid. Find the total surface area of cuboid.

Answer 1

Volume of each cube = 125
a^3 = 125
a = 5 cm

So side of each cube = 5 cm

When the 3 cubes are joined to form a new cuboid, then
Length of cuboid = 5+5+5 = 15 cm
breadth = 5 cm
height = 5 cm

Then we can find the Total surface area of cuboid by the following:

TSA = 2(lb + bh + lh)

Let me know if you need any help.

Thanks,
Midhun