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CBSE Class 9 Answered

A room is 20 m long, 18 m broad and 11 m high; it has a door 4 m by 8 m. Find the cost of papering its wall excluding the door at the rate of Rs 4 per m2.
Asked by Topperlearning User | 23 Aug, 2017, 12:52: PM
answered-by-expert Expert Answer

 

Given dimensions of the room are length (l) =20 m, breadth (b)=18 m and height(h)=11 m

Area of four walls=2(l+b)h=836 m2

Area to be papered= Area of four walls–area of door=836 -(4×8)=804 m2

Cost of papering 1 m2 = Rs 4

Therefore, cost of papering 804 m2 =Rs {804×4}=Rs 3216

 

Answered by | 23 Aug, 2017, 02:52: PM

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