Question

Two cubes each of 9cm are joined end to end. Find the total surface area of the resulting cuboid

Answer 1

Answer: 810 cm²

Step-by-step explanation:

1. find the surface area of one side of one of the Cubes

    9 x 9 = 81 cm²

2. then find the surface area of as many sides of the cube will be showing...

    81 x 5 (sides) = 405 cm²

3. lastly, take the surface area of the five sides of the cube and double it because you are joining the two cubes together to form a cuboid...

    405 x 2 = 810 cm²

(please mark as brainliest)

Answer 2

Answer:

Two cubs with edge length 8 cm are joined

new length = 2 (8 cm) = 16 cm

new breadth = 8 cm

new height = 8 cm

Surface area of cuboid 2 (lb+bh+hl)

=2[16×8+8.8+8×16]

2[320]=640cm