Hello, Dug!

4. Two inverted conical tanks have their vertices connected by a pipe.

One tank, initially full of water, has a height of 6 feet and a base radius of 3.5 feet.

The other tank, initially empty, has a height of 9 feet and a base radius of 4 feet.

If the water is allowed to flow through the connecting pipe, find the level to which

the water will rise in the empty tank. (Neglect the water in the pipe.)

The water will be at the same height in both tanks.

Code:

4
*---------+---------*
3.5 :\ | /
*-------+-------* : \ | /
:\ | / : \ | /
: \ | r1 / : \ | r2 /
: \----+----/ 9 \----+----/
6 \ | / : \ | /
: \ |h / : \ |h /
: \ | / : \ | /
: \|/ : \|/
- *-------------------*

The original volume of water is: .

The volume of water in the small tank is: .

. . where: .

Hence: .

The volume of water in the large tank is: .

. . where: .

Hence: .

Since , we have: .

. .