A cuboid swimming pool is 50m in length and 25m in width. Pump water to it. If you can inject 5M3 water per minute to make the water depth 1 or 2m, the pump will inject water for several hours Who can play tonight

A cuboid swimming pool is 50m in length and 25m in width. Pump water to it. If you can inject 5M3 water per minute to make the water depth 1 or 2m, the pump will inject water for several hours Who can play tonight

The volume of the pool is (50 × 25 × 1.2) = 1500
If the water injection is 5 cubic meters per hour, it will take 1500 △ 5 = 300 minutes
300 minutes = 5 hours

How to purify the water in the swimming pool?
Our company has built a small swimming pool for the staff. It has a circulation system. There are two pools, one can fill about 100 tons of water, the other can fill about 130 tons of water, because what we put is not tap water, but deep well water. All the water is muddy. We have sodium hypochlorite, copper sulfate and flocculant, How to use these three things to purify water to meet the standard of general swimming pool,

Add 2-3kg sodium hypochlorite to disinfect every day. Add copper sulfate to remove algae once a week. Add flocculant to the water. Sink the dirty things to the bottom of the pool and suck them out with a sewage suction machine. If there is a circulating filtering equipment, it is recommended to use enzyme clarifier instead of sucking. It can easily solve the problem of mixing and discoloration of swimming pool water

A rectangular swimming pool is 50 meters long, 45 meters wide and 3 meters deep. How many cubic meters of water can the pool hold?

50*45*3=1575