Mensuration Practice Test 5

Volume of the parallelepiped = l × b × h
1x × 2x × 3x = 1,296 $\mathit{c}{\mathit{m}}^3$
$6{\mathit{x}}^3$ = 1,296
${\mathit{x}}^3$ = 216
x = 6 cm.
Edges = 6 cm, 12 cm, 18 cm
Whole surface area of the parallelepiped
= 2(lb + bh + hl)
= 2(6 ×12 +12 ×18 +18 × 6)
= 2(72 + 216 +108)
= 792 $\mathit{c}{\mathit{m}}^2$