Question

measure and write the length, width and height of your drawing room and find the
1. total surface area of the room, ignoring the area of windows and doors.
2. the lateral surface area of this room.
3. the total area of the room which needs to be whitewashed.​

Answer 1

Answer:

Solution

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It is given that length, breadth and height of a room are 8 m, 5 m and 3 m respectively.

Area of four walls of the room is: 2h(l+b)

A=2h(l+b)=2×3(8+5)=6×13=78 m

2

Area of the ceiling is:

A=l×b=8×5=40 m

2

Total area of the four walls and the ceiling of the room is 78+40=118 m

2

It is given that cost of white washing is Rs.15/m

2

, therefore,

Total cost of white washing is:

118×15=1770

Hence, the cost of white washing the walls is Rs.1770.

Answer 2

Answer:

Step-by-step explanation:

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