One afternoon, Dave cast a 5-foot shadow. At the same time, his house cast a 20-foot shadow. If Dave is 5 feet 9 inches tall, how tall is his house?
His house is
When Dave, whose shadow is
This is because shadows are formed by sun, who in comparison is at a huge distance. For example, if such shadows are formed by a beam of light from a lamp post, the same may not be in same proportion.
What this means is that Dave's height of
In other words,
Hence, his house is
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