Question

plzz solve Q 9 in the following image

Answer 1

Area of 4 walls = 2h(l+b)
=> 2*3.5(6+5)
=> 7*11 = 77 m sq.
area of ceiling = l*b = 5*6 = 30
Area of 1 door = l*b = 1.1*2 = 2.2 m sq.
therefore area of 2 doors = 2.2*2 = 4.4
Area of a window = 1.5*1.4 = 2.1
Area of 3 window = 2.1*3 = 6.3 m sq.
Area to be white washed = area of walls + area of ceiling - area of 2 doors - area of 3 windows
=> 77 + 30 - 4.4 - 6.3 = 96.3 m sq.
cost of whie washing = rate * area
=> 5.30 * 96.3 = Rs. 510.39(Ans)
Hope this is correct.:-)
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