1.

Water flows in a tank\[150\,m\,\times \,100\,m\] mat the base, through a pipe whose cross-section is 2 dm by 1.5 dm at the speed of 15 km per hour. In what time, will the water be 3 metres deep?

A. 50 hours
B. 150 hours
C. 100 hours
D. 200 hours
Answer» D. 200 hours


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