Question

A room is 5 m 40 cm long and 4 m 50 cm broad. Its area is
(a) 23.4 m²
(b) 24.3 m²
(c) 25 m²
(d) 98.01 m²

Answer 1

(b) 24.3 m²

Length of the room = 5 m 40 cm = 5.40 m
Breadth of the room = 4 m 50 cm = 4.50 m

$$\begin{gathered} \mathrm{Area}\mathrm{of}\mathrm{the}\mathrm{room}=(\mathrm{Length}\times \mathrm{Breadth})=(5.40\times 4.50){\mathrm{m}}^2 \\ =\left(\frac{540}{100}\times \frac{450}{100}\right){\mathrm{m}}^2 \\ =\left(\frac{27}{5}\times \frac{9}{2}\right){\mathrm{m}}^2 \\ =\frac{243}{10}{\mathrm{m}}^2=24.3{\mathrm{m}}^2 \end{gathered}$$