A cubical box of cardboard has an edge $4.8 m$ long. How many closed cubical boxes of dimensions $24 cm\times 12 cm\times 10 cm$ can be made out of it?

Shika wants to cover a gift box whose dimensions are $20 \mathrm{cm}, 30 \mathrm{cm} \mathrm{and} 8 \mathrm{cm}$. She has a piece of a paper of area $1 m^2$. Will she be able to cover the gift ? Explain.

The walls and ceiling of a room are to be plastered. The length, breadth, and height of the room are $4.5 \mathrm{m}, 3 \mathrm{m} \mathrm{and} 350 \mathrm{cm}$ respectively. Find the cost of plastering the room at the rate of $₹12$ per $m^2$.