Question 154429: a rectangular tank has a base area of 7000cm2. 2 taps are turned on at the same time to fill the tank. tap a can deliver 5 litres of water in 20 seconds. tap b can deliver 2.5 litres of water in 15 seconds.if the height measures 25cm, how long will it take to fill up the tank completely?
ps. do not use algebra but if there is no choice, its okay.
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! a rectangular tank has a base area of 7000cm2. 2 taps are turned on at the same time to fill the tank. tap a can deliver 5 litres of water in 20 seconds. tap b can deliver 2.5 litres of water in 15 seconds.if the height measures 25cm, how long will it take to fill up the tank completely?
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The volume is the area of the base times the height, or 7000*25 cc
V = 175000 cc (cubic centimeters) or 175 liters
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Tap A's flow is 5.0 liters in 20 seconds, or 15 l/min
Tap B's flow is 2.5 liters in 15 seconds, or 10 l/min
The sum is 25 liters/min.
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175 at 25/min will take 7 minutes, 175/25.
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