math
If a person standing 5 feet tall casts a shadow 12 feet long, then how long is a tree's shadow if a tree stands 17.5 feet tall?
asked by
anonymus

x=shadow length
12/x=5/12
5/12=0.417
12/x=0.417
12/0.416=28.8ft
check:12/28.8=0.417
28.8ftposted by jerome

the ratio of shadow/height is constant, so
12/5 = x/17.5
or, the height and shadow scale the same way, so since 17.5 is 3.5 times 5, the shadow will be 3.5 times 12 feet long.posted by Steve

got me numbers mixed up, sorry
posted by jerome

replace 12 with 17.5
posted by jerome
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