Answer:
Given, the triangular side walls of a flyover have been used for advertisements.
The sides of the walls are 13 m, 14 m and 15 m.
The advertisements yield an earning of Rs. 2000 per m² a year.
A company hired one of its walls for 6 months.
We have to calculate the rent paid by the company for 6 months.
Let a = 13 m
b = 14 m
c = 15 m
By Heron’s formula,
Area of triangle = √s(s - a)(s - b)(s - c)
Where s = semiperimeter
s = (a + b + c)/2
So, s = (13 + 14 + 15)/2
= 42/2
s = 21 m
Area = √21(21 - 13)(21 - 14)(21 - 15)
= √21(8)(7)(6)
= √7 × 3 × 4 × 2 × 7 × 3 × 2
= 7 × 3 × 2 × 2
= 21 × 4
Area = 84 m²
Cost of advertising per year for 1 m² = Rs. 2000
Advertisement cost per year for 84 m² = 2000 × 84
= Rs.168000
Rent paid by the company for 6 months = 168000/2
= Rs. 84000
Therefore, the rent paid by the company is Rs. 84000/-
Step-by-step explanation:
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Answers & Comments
Answer:
Given, the triangular side walls of a flyover have been used for advertisements.
The sides of the walls are 13 m, 14 m and 15 m.
The advertisements yield an earning of Rs. 2000 per m² a year.
A company hired one of its walls for 6 months.
We have to calculate the rent paid by the company for 6 months.
Let a = 13 m
b = 14 m
c = 15 m
By Heron’s formula,
Area of triangle = √s(s - a)(s - b)(s - c)
Where s = semiperimeter
s = (a + b + c)/2
So, s = (13 + 14 + 15)/2
= 42/2
s = 21 m
Area = √21(21 - 13)(21 - 14)(21 - 15)
= √21(8)(7)(6)
= √7 × 3 × 4 × 2 × 7 × 3 × 2
= 7 × 3 × 2 × 2
= 21 × 4
Area = 84 m²
Cost of advertising per year for 1 m² = Rs. 2000
Advertisement cost per year for 84 m² = 2000 × 84
= Rs.168000
Rent paid by the company for 6 months = 168000/2
= Rs. 84000
Therefore, the rent paid by the company is Rs. 84000/-
Step-by-step explanation:
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Step-by-step explanation:
please mark me as brainlist please request