the dimensions of a room are length 4.8 breadth 3.2 metre and height 3 metre room as a window of size 1 metre by 1.25 metre and two doors each of size 1 metre by 2 metre find the cost of painting the walls of the room at the rate of rupees 40 per metre square
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Answer:
Rs. 1710
Step-by-step explanation:
L.S.A. of room = 2(l+b)*h
= 2*(4.8+3.2)*3
= 2*(8)*3
= 48 cm sq
area of window = 1.25*1 = 1.25 m sq
area of 2 doors = 2 (1*2) = 4 m sq
on removing the area of doors and window:
48-(4+1.25)
42.75 m sq
cost of painting = Rs. 40/m sq
cost of painting 42.75 m sq = 40*42.75 = Rs. 1710 ans
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