Question

lateral surface area of cube of side 3cm​

Answer 1

Answer:

We know that the length of the edge of the cube is 3cm. Substituting a=3 in the formula 6a2, total surface area of the cube =6(3)2=54cm2. Hence, the total surface area of the cube is 54cm2 when the length of the edge is 3cm. (b) We know that the length of the edge of the cube is 5cm

Answer 2

Step-by-step explanation:

Question :-

• Find the lateral surface area of cube of side 3 cm.

To Find :-

• LSA of cube.

Solution :-

Given :

• Side = 3 cm

By using the formula,

${\sf{\longrightarrow LSA\ of\ cube\ =\ 4a^2}}$

Where,

• a = length of the side

According to the question, by using the formula, we get :

${\sf{\longrightarrow LSA\ of\ cube\ =\ 4a^2}}$

${\sf{\longrightarrow 4(3)^2}}$

${\sf{\longrightarrow 4(9)}}$

${\sf{\longrightarrow 4 \times 9}}$

${\sf{\longrightarrow 36\ cm^2}}$

$\therefore$ Hence, LSA of cube is 36 cm².

More To Know :-

$\begin{array}{|c|c|c|}\cline{1-3}\bf Shape&\bf Volume\ formula&\bf Surface\ area formula\\\cline{1-3}\sf Cube&\tt l^3}&\tt 6l^2\\\cline{1-3}\sf Cuboid&\tt lbh&\tt 2(lb+bh+lh)\\\cline{1-3}\sf Cylinder&\tt {\pi}r^2h&\tt 2\pi{r}(r+h)\\\cline{1-3}\sf Hollow\ cylinder&\tt \pi{h}(R^2-r^2)&\tt 2\pi{rh}+2\pi{Rh}+2\pi(R^2-r^2)\\\cline{1-3}\sf Cone&\tt 1/3\ \pi{r^2}h&\tt \pi{r}(r+s)\\\cline{1-3}\sf Sphere&\tt 4/3\ \pi{r}^3&\tt 4\pi{r}^2\\\cline{1-3}\sf Hemisphere&\tt 2/3\ \pi{r^3}&\tt 3\pi{r}^2\\\cline{1-3}\end{array}$