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3. The figure shows taps A and B and an empty tank. Tank: 30 cm 20 cm 55 cm
At 2 p.m., tap A was turned on. Water flowed into the tank from tap A at a rate of 4.2 litres per minute. After 5 minutes, tap B was turned on. At 2.15 p.m., the tank was half filled with water. (a) How many litres of water flowed out of tap B in 1 minute? (b) At 2.30 p.m., what fraction of the tank was filled with water?
Sagot :
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