Soal SMA · Soal cerita · Kesulitan 2/5
A water tank is filled by two pipes. Pipe A can fill the tank in 6 hours, and Pipe B can fill it in 4 hours. If both pipes are opened together, how long will it take to fill the tank?
- A.2 hours
- B.2.4 hours
- C.3 hours
- D.3.6 hours
Kunci jawaban & pembahasan
Jawaban: 2.4 hours
Pipe A rate = 1/6 tank/hour, Pipe B rate = 1/4 tank/hour. Combined rate = 1/6 + 1/4 = 5/12 tank/hour. Time = 1 / (5/12) = 12/5 = 2.4 hours.
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