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A room is 8m60cm long,3m50cm wide and 2m40cm high. it has 2 doors measuring 1.4m×2.6mand a window measuring 2.2m×1.56m, find yhe cost of wall paper used on its wall which costs Rs.42 per metre square
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Dimensions of the room = 860cm*350cm*240cm
Curved surface area = 2lh + 2bh
= 2*860*240 + 2*350*240
= 580800 cm²
Area of two doors = 2*140*260
= 72800 cm²
Area of window = 220*156
= 34320 cm²
Hence total area where wall paper need to be used
= 580800 - ( 72800 + 34320 ) = 473680 cm² = 47.368 m²
Hence, cost = 47.368*42 = Rs 1989.456
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