Answer
300$ft^{2}$
Work Step by Step
We need to find the area of the wall. Wall can be divided into rectangle and a triangle
Area of wall = area of rectangle + area of triangle
Area of rectangle whose base has length b and height has length h
is given by A =bh
From the given diagram b= 24 ft h = 10 ft
Area of rectangle = bh = 24 ft * 10 ft = 240 $ft^{2}$
Area of triangle whose base has length b and altitude has length h is given by A = $\frac{1}{2}$ bh
From given diagram base b = 24
h = 15 -10 = 5 ft
Area = $\frac{1}{2}$ * 24 * 5 = 60 $ft^{2}$
Therefore area of the wall = 60 + 240 = 300$ft^{2}$
