Question

Four cubes of volume $125c{m}^3$ ach are joined end to end, in a row. Find the surface area and volume of the resulting cuboid (see fig).

Answer 1

Legth of cuboid $=l=20cm$

breadth of cuboid $=b=5cm$

Height of cuboid $=L=5cm$

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

Surface area $=2\left[\right(20\times 5)+(5\times 5)+(5\times 20\left)\right]=450c{m}^2$

Volume $=lbh=20\times 5\times 5=500c{m}^2$