SOLUTION: Justin can climb a coconut tree at the rate of 10 ft. per minute and return at 20 ft. per minute. If it took him 3 minutes to climb and return, what is the height of the coconut t

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Question 848730: Justin can climb a coconut tree at the rate of 10 ft. per minute and return at 20 ft. per minute. If it took him 3 minutes to climb and return, what is the height of the coconut tree
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Justin can climb a coconut tree at the rate of 10 ft. per minute and return at 20 ft. per minute. If it took him 3 minutes to climb and return, what is the height of the coconut tree
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Up the tree DATA:
rate = 10 ft/min ; time = t min ; distance = 10t ft
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Down the tree DATA:
rate = 20 ft/min ; time = 3-t min ; distance = 20(3-t) ft
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Equation:
dist up = dist down
10t = 20(3-t)
10t = 60-20t
30t = 60
time up = 2 min
distance up = 10*(2)min = 20 ft (height of the tree)
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Cheers,
Stan H.
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