Question

the floor of a rectangular hall has a perimeter of 280 metre its height is 6 metre find the cost of white washing the floor walls (including door,windowsetc)at the rate of ruppes10m2​

Answer 1

Step-by-step explanation:

Given The floor of a rectangular hall has a perimeter of 280 metre its height is 6 metre find the cost of white washing the floor walls (including door,windows etc) at the rate of rupees 10 per m^2

• Now we know that floor is rectangular shape.
• Perimeter of rectangle = 2(l + b) = 280
• So l + b = 280 / 2
• Or l + b = 140 m  
• Given height of the wall = 6 m
• Now white washing four walls including doors and windows will be
• Lateral surface area of cuboid = 2h(l + b)
•                                                   = 2 x 6 x 140
•                                                    = 1,680 m^2
• Now cost for white washing 1 m^2 is Rs 10
• Therefore cost for white washing 1,680 m^2 will be 1,680 x 10
•                                                                                = Rs 16,800

Reference link will be

https://brainly.in/question/1429723

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