---------- Once three teachers Mathematics, Physics and Chemistry went to the riverside with their friends group. The Mathematics teacher said: "I'll measure it's length, breadth and width.

" And jumped into it.

Then came the Physic teacher who said: "I'll measure it's speed and heat.

" And jumped into it. Finally came the Chemistry teacher who said: "Since none has come out, it seems both of them have been dissolved in the water."