SOLUTION: a 12 foot tree casts a 16 foot shadow. How many feet tall is a nearby tree that casts a 20 foot shadow at the same time ?

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Question 243432: a 12 foot tree casts a 16 foot shadow. How many feet tall is a nearby tree that casts a 20 foot shadow at the same time ?
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
12/16=x/20 cross multiply.
16x=12*20
16x=240
x=240/16
x=15 ft. tall is the nearby tree.
Proof:
12/16=15/20
3/4=3/4