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Using ratios of height : shadow length, and letting t be the height of the tree t : 5 = 100 : 0.4 we cross multiply 0.4 x t = 5 x 100 0.4t = 500 Divide both sides by 0.4 t=1250 mm or 12.5 cm

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15y ago
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Q: If a tree cast shadow that measures 5 millimeters and a meter stick cast a shadow that measures 0.4 millimeters how tall is the tree?
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