A cylindrical tank holds 20,000 gallons of water, which can be drained from the bottom of the tank in 20 minutes. The function gives the volume V of water (in gallons) in the tank at time t in minutes, where time t = 0 corresponds to the instant the tank starts to drain. At time t = 3 minutes, at what rate is the volume of water in the tank changing? (Points : 1) –2200 gallons/minute 1700 gallons/minute 2200 gallons/minute –1800 gallons/minute 1800 gallons/minute

Question

A cylindrical tank holds 20,000 gallons of water, which can be drained from the bottom of the tank in 20 minutes. The function gives the volume V of water (in gallons) in the tank at time t in minutes, where time t = 0 corresponds to the instant the tank starts to drain.  At time t = 3 minutes, at what rate is the volume of water in the tank changing? (Points : 1) –2200 gallons/minute 1700 gallons/minute 2200 gallons/minute –1800 gallons/minute 1800 gallons/minute

jhonyy9 · Answer

using the rule of 3 simple you can write

20000 gallons draine in 20 minute
x gallons draine in 3 minute to calcule the x cross multiplie and get

20x = 3*20000 divide both sides by 20 and get

x = ?