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A building casts a 7.5m shadow at the same time that a 40m pole casts a shadow of 3m. How high is the building?
Wiki User
∙ 14y ago
Ratio of shadows = 3m:7.5m :: 1:2.5
So, the ratio of the heights (in the same order) is 1:2.5
ie Ht(Pole):Ht(Building) = 40m:Ht(Building) = 1:2.5
So Ht(Building) = 2.5*40m = 100 metres
Wiki User
∙ 14y ago
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