Question

Four identical cubes are joined end to end to form acuboid and the tsa = 648cm2 find the lenght of the edge in each cube

Answer 1

Answer:

Step-by-step explanation:Length of cuboid- 4*edge of cube

Breadth and height of cuboid- edge of cube.

TSA ofcuboid- 2(lb+bh+hl)

648 - 2(4a + a + a)

324-6a

a - 324/6

Edge of cube- 54cm

Answer 2

Given :-

Three cubes each of size 6 cm are joined end to end

To Find :-

Surface area

Solution :-

There are three cubes. So, total length would be 3(6) = 18 cm

Now

SA of cuboid = 2(lb + bh + lh)

SA of cuboid = 2[(18 × 6) + (6 × 6) + (18 × 6)]

SA of cuboid = 2[(108 + 36 + 108)}

SA of cuboid = 2[252]

SA of cuboid = 504 cm²