Question

Three cubes each with 8 cm edge are joined end to end. Find the total surface area of the resulting cuboid.

Answer 1

As is clear from the adjoining figure,
the length of the resulting cuboid
`=3xx8cm=24 cm`
Its width =8cm and its height = 8cm
i.e l=24 cm, b = 8 cm and h=8 cm
The total surface area of the resulting cuboid
`=2(lxxb+bxxh+hxxl)`
`=2(24xx8+8xx8+8xx24)cm^(2)=896 cm^(2)`