(27) The dimensions of an assembly hall are length 10 metre,
width 10 metre and height 6 metre. It has two doors
each of dimension (2 x 1.5) m^2 and four windows,
each of (2 x 2) m^2. Find the cost of distempering four
wall and ceiling at the rate of ₹5.
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6
Answer:
cost for distempering on wall and ceiling is 1590rs
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The cost of distempering the four walls and the ceiling at the rate of ₹5 = ₹ 1590
The area of the four walls of the assembly hall plus the area of the ceiling of the room = h × 2(l+b) + l×b
= 6 × 2(10+10) + 10 × 10
= 340 m²
Area of the four windows plus the two doors = 16 + 6
= 22 m²
Area of the assembly hall that has to be distempered = 340 - 22 = 318 m²
The total price of distempering the assembly hall = 5 × 318 = Rs. 1590
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