1.

A rectangular water tank is\[\mathbf{160m}\times \mathbf{20m}\]. Water flows at the opening at a speed of 10 km/hr. The water level will rise in the tank in half an hour by

A. \[\frac{3}{2}\]cm.
B. \[\frac{4}{9}\]cm,
C. \[\frac{5}{9}\]cm.
D. \[\frac{5}{8}\]cm.
Answer» E.


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