The window of a house is in the shape of a square and an equilateral triangle on its side as shown below. The side of the square is 1.5 metres. How much air can enter through this window ?

Question

$\begin{array}{1 1} (a)\; 3\;m^2 \\ (b)\; 4 \;m^2 \\ (c)\; 5 \; m^2 \\ (d)\;2\;m^2 \end{array}$