Find the surface area of a cube whose edge is 1.2m       (ii)  27cm     (iii) 3cm        (iv)  6m   (v)  2.1m

Explanation

(i) `1.2m`
Edge of the cube`=a=1.2` m
Surface area`=6a^2=6times(1.2)^2m^2=6times1.44=8.64m^2`
`therefore` Surface area`=8.64m^2`

(ii) `27cm`
Edge of cube`=a=27 cm`
Surface area`=6a^2=6times(27)^2 cm^2=6times729=4374 cm^2`
`therefore` Surface area`=4374 cm^2`

(iii) `3cm`
Edge of cube`=a=3 cm`
Surface area`=6a^2=6times(3)^2 cm^2=6times9 cm^2=54 cm^2`
`therefore` Surface area`=54 cm^2`

(iv) `6m`
Edge of cube`=a=6m`
Surface area`=6a^2=6times(6)^2m^2=6times6times6=216m^2`
`therefore` Surface area`=216m^2`

(v) `2.1m`
Edge of the cube=a=2.1m
Surface area`=6a^2=6times(2.1)^2m^2=6times4.41=26.46 m^2`
`therefore` Surface area`=26.46 m^2`