This Lesson (Climbing a coconut tree up and down) was created by by ikleyn(52750): View Source, Show About ikleyn:
Climbing a coconut tree up and down
Problem 1
Many romy can climb a coconut tree at the rate of 10 feet per minute and return at 20 feet per minute.
If it took him 3 minutes to climb and return, what is the height of the coconut?
Solution
Let x be the tree's height.
Then the time for climbing up from the ground to the upper point is minutes,
while the time returning back os minutes.
Therefore, the time equation is
+ = 3 minutes.
Multiply both sides by 20. You will get
2x + x = 3*20
3x = 60 ====> x = = 20 ft.
Answer. The height of the coconut is 20 feet.
