A rectangular tank measuring 7 meters in length and 4 meters in width needs to have its water level increased by 4.5 cm in 6 hours and 18 minutes. Through pipes that are 5 cm wide and 4 cm deep, at what velocity should the water flow to achieve this rise?
Explanation
To raise the water level by 4.5 cm in the given tank dimensions within 6 hours and 18 minutes, the water must flow through the pipes at a speed of 10 km/hr. This ensures the volume of water entering matches the required increase in water level.