Fatima wants to cover the rectangular floor of a room using square tiles. The dimensions of the floor are 4 m 80 cm × 7 m 20 cm. The side of each square tile is 60 cm.

If the cost of each tile is Rs 25, then the total cost to cover the entire floor with the tiles is [[1]].

1 m = 100 cm

Length of the floor = 7 m 20 cm = 7 × 100 cm + 20 cm = 720 cm

Breadth of the floor = 4 m 80 cm = 4 × 100 cm + 80 cm = 480 cm

Area of the floor = 720 cm × 480 cm

Area of one square tile = Side × Side = 60 cm × 60 cm

Thus, number of tiles required to cover the entire floor $=\frac{\mathrm{Area} \mathrm{of} \mathrm{the} \mathrm{floor}}{\mathrm{Area} \mathrm{of} \mathrm{a} \mathrm{square} \mathrm{tile}}$ 

$$\begin{gathered} =\frac{720\times 480}{60\times 60} \\ =12\times 8 \\ =96 \end{gathered}$$

Cost of one tile = Rs 25

Thus, cost of covering the entire floor with tiles = Cost of 96 tiles = Rs (96 × 25) = Rs 2400