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?

The sides of the triangular side walls of flyover are 122m, 22m, and 120m.

Parameter of the triangle = 122 + 22 + 120


= 264m


Semi perimeter of triangle(s) =


= 132m


Now,


Using Heron’s formula,


Area of the advertisement =


=


=


=


= 1320 m2


Rent of advertising per year = Rs. 5000 per m2


Rent of one wall for 3 months =


= Rs. 1650000


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