A rectangular water tank is 80 m x 40 m. Water flows into it through a pipe of 40 sq.cm at the opening at a speed of 10 km/hr. The water level will rise in the tank in half an hour is
Answer: D
A rectangular water tank is 80 m x 40 m. Water flows into it through a pipe of 40 sq.cm at the opening at a speed of 10 km/hr. The water level will rise in the tank in half an hour is
Volume of water filled by pipe in 30 minutes
-----> (40 *1000000/2) cu.cm
-----> = 2000000 cu.cm
Therefore, Height of water level
-----> (2000000/8000 *4000)
-----> = (5/8) cm.
Hence the answer is: (5/8) cm