At 17:15 a heavy rain begins, falling with constant intensity. A swimming pool in the shape of a rectangular parallelepiped, which was initially empty, begins to accumulate rainwater and, at 18:00, the water level inside reaches 20 cm in height. At this instant, the valve that releases water drainage through a drain located at the bottom of this pool is opened, whose flow rate is constant. At 18:40 the rain stops and, at that exact instant, the water level in the pool dropped to 15 cm. The instant when the water in this pool will finish draining completely is between (A) 19:30 and 20:10. (B) 19:20 and 19:30. (C) 19:10 and 19:20. (D) 19:00 and 19:10. (E) 18:40 and 19:00.
At 17:15 a heavy rain begins, falling with constant intensity. A swimming pool in the shape of a rectangular parallelepiped, which was initially empty, begins to accumulate rainwater and, at 18:00, the water level inside reaches 20 cm in height. At this instant, the valve that releases water drainage through a drain located at the bottom of this pool is opened, whose flow rate is constant. At 18:40 the rain stops and, at that exact instant, the water level in the pool dropped to 15 cm.
The instant when the water in this pool will finish draining completely is between\\
(A) 19:30 and 20:10.\\
(B) 19:20 and 19:30.\\
(C) 19:10 and 19:20.\\
(D) 19:00 and 19:10.\\
(E) 18:40 and 19:00.