Question

If length, breadth and height of a cuboid are $20cm$, $15cm$ and $10cm$ respectively, then find :
(a) Area of the base.
(b) Surface area of its vertical faces.
(c) Volume.

Answer 1

$l=20cm$, $b=15cm$, $h=10cm$.
(a) Area of base $=lb$
$=20\times 15$
$=300{cm}^2$.
(b) Surface area of its vertical faces
$=2(lh+bh)$
$=2(20\times 10+15\times 10)$
$=2\times 350$
$=700{cm}^2$
(c) Volume $=lbh$
$=20\times 15\times 10$
$=300\times 10$
$=3000{cm}^3$.