Mensuration Practice Test 2

Edge of the rectangular box = 1x, 2x, 3x
Area of the rectangular box = 2(lb + bh + hl)
= 88 $\mathit{c}{\mathit{m}}^3$
2(1x × 2x + 2x × 3x + 3x ×1x) = 88
$2\left(2{\mathit{x}}^2+6{\mathit{x}}^2+3{\mathit{x}}^2\right)$ = 88
$2\left(11{\mathit{x}}^2\right)$ = 88
${\mathit{x}}^2$ = $\frac{88}{22}$ = 4
x = 2 cm.
Edge of the rectangular box 2 cm, 4 cm, 6 cm
Volume of the rectangular box 2 × 4 × 6 = 48 $\mathit{c}{\mathit{m}}^3$