A rectangular parallelepiped is made by joining two cubes of side 6 cm along one face. Find its surface area.
Show answer & explanation
Correct answer: B
Explanation
Side of the cube (a) = 6 cm
Surface area of the rectangular parallelepiped = 2(lb + bh + hl)
Length (l) = 6 + 6 = 12 cm, Width (b) = 6 cm, Height (h) = 6 cm
Surface area = 2(12×6 + 6×6 + 6×12) = 360 cm²