Question

Three cubes each of side 5 cm are joined end to end to form a cuboid. Find the surface area of the resulting cuboid.

Answer 1

Step-by-step explanation:

Length of each side of cube = 5 cm

Now, 3 cubes are joined end to end.

So, the length of the resulting cuboid will be = 5+5+5 = 15 cm

But, the breadth and height will remain the same.

So, Breadth = 5 cm and Height = 5 cm

Surface area of the cuboid = 2(LB + BH +HL)

= 2(15*5 + 5*5 + 5*15)

= 2(75 + 25 + 75)

= 2*175

Surface area of the cuboid = 350 sq cm