Interesting math problem......

[Hoeboy]

The surface of a pond is a 40x40 square. A reed in the middle of it sticks 8 units out of the water. But when it is pulled gently to the nearest edge of the pond, it barely reaches it. How deep is the pond?


EH?

 

[chiwawa626]

42

 

[RbSX]

whats interesting about math?

 

[Kk4JC]

Not enough info?!? I think?!?
It's been a long day.

Kk

 

[gopunk]

21 units

model it as a right triangle and use pythagorean theorem... hypotenuse is 8+x, one side is 20, the other side is x.

 

[PowerEngineer]

(X+8)**2 = X**2 + 20**2 ==> X = 21 units

 

[BaDaBooM]

A reed in the middle of it sticks 8 units out of the water. But when it is pulled gently to the nearest edge of the pond, it barely reaches it.

Not to nit-pick or anything, but if it is in the middle then how is there a nearest edge? Shouldn't it be equally distant from all four edges?

 

[DanFungus]

Originally posted by: BaDaBooM

A reed in the middle of it sticks 8 units out of the water. But when it is pulled gently to the nearest edge of the pond, it barely reaches it.

Not to nit-pick or anything, but if it is in the middle then how is there a nearest edge? Shouldn't it be equally distant from all four edges?

then it'd be a circle

 

[her209]

Originally posted by: PowerEngineer
(X+8)**2 = X**2 + 20**2 ==> X = 21 units

 

[TuxDave]

This isn't interesting at all... *yawn*