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. The advertisements yield an earning of Rs 5000 per
per year. A company hired one of its walls for 3 months. How much rent did it pay?
Solution:
Length of first side of triangle
m
Length of second side of triangle
m
Length of third side of triangle
m
Semi-perimeter of triangle
m
Using Heron’s formula to find area of triangle, we get
Area of triangle
1
of area costs Rs 5000 in advertising for 12 months
So, cost of 1320
of area for 12 months
Rs
Cost of 1320
of area for 3 months
Rs
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