Math, asked by rajlakshmiinternet, 1 year ago

If the perimeter of a room is 28m and its height is 2.5m. Then the cost of white washing its wall at the rate of 5 per square metre is

Answers

Answered by venupillai
9

Answer:

The total cost of white-washing its four walls is Rs.350

Step-by-step explanation:

Let a, b, c and d be the lengths of the sides of the room. Let h be the height of  the walls. (Height will be common to all four walls!)

The sum of the areas of the four walls will be:

a*h + b*h + c*h + d*h

= (a+b+c+d)*h

= Perimeter * Height

Area of four walls in the given problem is:

28 * 2.5

= 70 sqm

Cost of white-washing is Rs.5 per sqm

Total cost of white-washing = 70 * 5

                                               = 350

Answered by ShreyansShetty
5

Answer:

here is your answer

mark as BRAINLIST answer

Attachments:
Similar questions