Two cubes, each having a total surface area of 150 cm2, are joined together to form a cuboid. Find the total surface area of the resulting cuboid.
Answer & explanation
Correct answer: option 3
We know that,
Total Surface Area of cube = 6 × side2
Total Surface Area of cuboid = 2 × (lb + bh + hl)
We have,
Surface area of each cube = 150 cm2
Total Surface Area of cube = 6 × side2 = 150
side = 5 cm
Length = l = 5 + 5 = 10
Breadth = b = 5 cm
Height = h = 5 cm
Total Surface Area of cuboid = 2 × (10 × 5 + 5 × 5 + 5 × 10) = 250 cm2