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2480

Q:

Pipe A can fill a tank in 4 hours and pipe B can fill it in 6 hours. If they are opened on alternate hours and if pipe A is opened first then in how many hours, the tank shall be full? 

  • 1
    $$3{1\over 2}\ hrs$$
  • 2
    $$3{1\over 4}\ hrs$$
  • 3
    $$4{1\over 2}\ hrs$$
  • 4
    $$4{2\over 3}\ hrs$$
  • Show Answer
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Answer : 4. "$$4{2\over 3}\ hrs$$ "

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