room is 7 M long 7 M wide and 3.5 M height find the cost of covering it walls by a paper of 50 cm wide at the rate of 1.50per meter
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Length of room = 7m
Width of room = 7m
Height of room = 3.5m
We know that there are 5 walls (4 walls + 1 ceiling) in room
So, area of 5 walls = 2(l+b)h + l × b
= 2(7+7)3.5 + 7×7
= 28×3.5 +49 = 98+49 = 147m²
Cost of covering 1m² of wall with wall paper = Rs 3
∴ Cost of covering 147m² of wall with wall paper = Rs 147× 3 = Rs 441
Thank You!!!!!Hope this helps!!!!
Width of room = 7m
Height of room = 3.5m
We know that there are 5 walls (4 walls + 1 ceiling) in room
So, area of 5 walls = 2(l+b)h + l × b
= 2(7+7)3.5 + 7×7
= 28×3.5 +49 = 98+49 = 147m²
Cost of covering 1m² of wall with wall paper = Rs 3
∴ Cost of covering 147m² of wall with wall paper = Rs 147× 3 = Rs 441
Thank You!!!!!Hope this helps!!!!
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