Semi truck driver calls into Car Talk with broken fuel gauge on his rig wants to find out how high up is the 1/4 full mark on his horizontal barrel fuel tank. Answers come using calculus [area under a curve] and advanced geometry. Then an answer from a guy I want on my boat. Take a can of beer and 4 identical glasses. pour beer in glasses till equal in each glass. Drink 3 of the glasses of beer. Cut hole in side of can, lay on side and pour one glass [1/4 of liquid] into can. Measure
Tom Evans
SV Tappan Zee
Zihuatanejo Mexico