A room,: length = 5m breadth = …
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Shweta Gulati 6 years, 11 months ago
(1)
Dimensions of room :
l = 5m ; b = 3.5m ; h= 3m
LSA of room = 2(l+b) x h
= 2 ( 5 + 3.5) x3
= 6 x 8.5
= 52 m2
1 m2 = Rs. 20
52 m2 = Rs. 20 x 52 = Rs. 1040
(2)
Let the edge of the cube be 'a'
Surface area = 6a2
Let the edge be increased by 50% so the new edge becomes = a + (a/2) = 3a/2
New Surface area = 6 (3a/2)2 = 27a2/2
Percentage increase = [Change in Increase/ Original] x 100
= [(27a2 - 12a2)/ 6a2 x 2 ] x 100
(5 x 100 )/4
5 x 25 = 125%
1Thank You