Q2. The triangular side walls of a flyover have been used for advertisements. The sides of the walls are 122 m, 22 m and 120 m (see Fig. 12.9). The advertisements yield an earning of Rs. 5000 per m2 per year. A company hired one of its walls for 3 months. How much rent did it pay?
From the figure,
The sides of the triangle are:
The semi perimeter, s will be
Therefore, the area of the triangular side wall will be calculated by the Heron's Formula,
Given the rent for 1 year (i.e., 12 months) per meter square is Rs. 5000.
Rent for 3 months per meter square will be:
Therefore, for 3 months for 1320 m2 :