A rectangular room is 9 m long, 8 m wide and 6 m high. Find the cost of white
washing its walls and the roof at 8.50 per squa

2 thoughts on “A rectangular room is 9 m long, 8 m wide and 6 m high. Find the cost of white<br />washing its walls and the roof at 8.50 per squa”

1. Step-by-step explanation:

   Given,

   Length of room =6m

   Breadth of room =5m

   Height of room =3.5m

   So, Area of four walls =2(+b)×h=2(6+5)×3.5=77m

   2

   Area of 2 doors and 3 windows =(2×1.1×2+3×1.5×1.4)=(44+6.3)m

   2

   =10.7m

   2

   Area of ceiling =l×b=6×5=30m

   2

   Thus, total area for whitewashing =(77−10.7+30)m

   2

   =96.3m

   2

   Hence, the cost of whitewashing =Rs.(96.3×5.30)=Rs.510.39

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2. Step-by-step explanation:

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   Refer to the above attachment ⬆️⬆️.

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