PROBLEM # 2
One mile upstream from his starting point, a rower passed a log floating with the current. After rowing upstream for one more hour, he rowed back and reached his starting point just as the log arrived. How fast was the current flowing??

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Problems from 03/01/12

PROBLEM #1
In how many ways, counting ties, can eight horses cross the finishing line?

SOLUTION 1
 69281.

PROBLEM #2
Find the area of the largest semicircle that can be inscribed in the unit square.

SOLUTION 2
0.539.

Congratulations to Aseem Chandawarkar and Vijay Aivalli, who were the winner of the last set of puzzles.