a rectangular plot of land measures 41m im length and 22.5m in width. A boundary wall of 2m high is built all around the plot at a distance of 1.5m from the plot. find the inner surface area of the boundry wall.
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area of inner surface is41×1.5=977.5and area of outer surface is42.5×23=922.5 now977.5-922.5=55
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