Question

The total surface area of this cuboid is 112cm squared find the value of x

Answer 1

Answer:

$x=2\sqrt{\frac{14}{3}}\ units$  or  $x=\frac{2}{3}\sqrt{42}\ units$

Step-by-step explanation:

we know that

The surface area of a cube is equal to

$SA=6x^{2}$

where

x is the length side of a cube

In this problem we have

$SA=112\ cm^{2}$

substitute in the formula and solve for x

$112=6x^{2}$

$x^{2}=112/6$

square root both sides

$x=\sqrt{\frac{112}{6}}\ units=2\sqrt{\frac{14}{3}}\ units=\frac{2}{3}\sqrt{42}\ units$

Answer 2

Answer:

3

Step-by-step explanation:

3x2=6

6+6=12

10x3=30

30+30=60

10x2=20

20+20=40

40+60+12=112

112cm