a picture is painted on a ceiling of marriage hall whose length and breadth are 18m and 7m there is a border of 10 cm along each of sides find the area of the border
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Step-by-step explanation:
Dimensions of ceiling
l = 18m
b = 7m
Dimensions along with 10cm = 0.1m border
l = 18+0.1 = 18.1m
b = 7+0.1 = 7.1m
Area of ceiling = l x b
= 18 x 7
= 126m^2
Area of ceiling including with border
= 18.1 x 7.1
= 128.51m^2
Therefore, area of border = 128.51 - 126
= 2.51m^2
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