Maharashtra Board Solutions for Exercise 4: Practice Set 47

If the total surface area of the cube having the side $6.8 \mathrm{m}$ is $k {\mathrm{m}}^2$. Find the value of $k$.

If the total surface area of the cube having the side $5.5 \mathrm{m}$ is $k {\mathrm{m}}^2$. Find the value of $k$.

Find the total surface area of the cuboid (in ${\mathrm{cm}}^2$) of length, breadth and height as given below: 

$12 \mathrm{cm}, 10 \mathrm{cm}, 5 \mathrm{cm}$

Find the total surface area of the cuboid (in ${\mathrm{cm}}^2$) of length, breadth and height as given below: 

$5 \mathrm{cm}, 3.5 \mathrm{cm}, 1.4 \mathrm{cm}$

Find the total surface area of the cuboid (in ${\mathrm{m}}^2$) of length, breadth and height as given below: 

$2.5 \mathrm{m}, 2 \mathrm{m}, 2.4 \mathrm{m}$

Find the total surface area of the cuboid (in ${\mathrm{m}}^2$) of length, breadth and height as given below: 

$8 \mathrm{m}, 5 \mathrm{m}, 3.5 \mathrm{m}$

A matchbox is $4 \mathrm{cm}$ long  $2.5 \mathrm{cm}$ $1.5 \mathrm{cm}$ broad and $1.5 \mathrm{cm}$ in height. Its outer sides are to be covered exactly with craft paper. How much paper (in ${\mathrm{cm}}^2$) will be required to do so?

An open box of length $1.5 \mathrm{m}$, breadth $1 \mathrm{m}$, and height $1 \mathrm{m}$ is to be made for use on a trolley for carrying garden waste. How much sheet of metal will be required to make this box? The inside and outside surface of the box is to be painted with rust-proof paint. At a rate of $₹150/{\mathrm{m}}^2$, how much will it cost to paint the box?