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The dimentions of a room are 8mx6mxh. It has two doors each of size 2mx1m and one almirah of size 3mx2m. The cost of covering the walls by wall paper which

is 40 cm wide at Rs. 1.25 per m is Rs. 362.50. Find height h.?


Area of 4 walls and room =2(l+b) h
area covered by doors = 2(2x1)
                                 =4 m 
area covered by almirah= 3x2
                                   =6 m
total area to be covered with wallpaper= 86h  -(10)

according to cost given 
area covered by wallpaper=   (362.50/1.25)m
                                      290 m

.'.   86h -10  =  290
     86h = 290+10
     86h = 300 
       h = 300/86
           h= 3.4  m


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