please help me please
Attachments:
Answers
Answered by
112
Given:
- The triangular side walls of a flyover have been used for advertisements
- The sides of the wall are 122m,22m,120m
- The advertisements yield at Rupees 5000 per m² per year
- A company hires one of its walls for 3months
Full Solution:
Question:
- Find the semiperimeter of the triangular wall
Solution:
➼ We know,
➱Here,
- 1st Side = 122m
- 2nd side = 22m
- 3rd side = 120m
Substituting we get,
- Henceforth the semi perimeter of the triangular wall is option (b) 132m
➱ We know,
- ↠ Semiperimeter of the wall is 132m
➼ Now,
- ↠ First side = 122m
So, the difference will be
★ 132 - 122m
★ 10m
_____________
- ↠ Second side = 22m
So, the difference will be
★ 132 - 22m
★ 110m
_________________
- ↠ Third side = 120m
So, the difference will be
★ 132 - 120m
★ 12m
- Henceforth the correct option is ( c ) 10m,110m,12m respectively
➱ Now, we are asked to find the area
We know that,
where,
- ↠ A stands for Area
- ↠S stand for Semiperimeter
- ↠ A,B,C are the sides
here,
- ↝Semiperimeter = 132m
- ↝Side A = 112m
- ↝Side B = 22m
- ↝ Side C = 120m
Substituting we get,
- Henceforth the area of the triangle is 1320m² option B
We know that the company used the walls for 3 months
- The cost per the advertisements is rupees 5,000 per m²per year
So,
- Cost per month will be month per m² will be
★ 5000/12
★416 + ( 8/12 ) rupees
- Henceforth the cost for the company to advertise per 3monts is rs.165000 option A
We know,
- The payment yearly per m² = 5,000 rupees
- Hence forth the cost of advertisement per annum = Rupees 66,00000
Additional Info:
- The area of a triangle ( When hieght and base are give) = 1/2 × base×hieght
- Sum of interior angles in a triangle add up to 180°
- The sum of its exterior angles add upto 360°
- In an right angled triangle and square of its hypotenuse is equal to the sum of squares of the other two sides
Similar questions