It is required to fix a pipe with circular cross section in such a way that sea water flowing through it at a speed of 14 meters per minutes fills a tank of capacity 440 cubic meters in 50 minutes. The inner radius of the pipe should be:
1
√5 m
2
2 m
3
½ m
4
\(\frac{1}{{\sqrt 5 }}\) m
5
None of these