Math MCQ: Pipe A can fill a tank in 9 hours and pipe B in 18 hours. If pipe A works for 3 hours and then pipe B alone finishes the work, how long will the total work take?

Pipe A can fill a tank in 9 hours and pipe B in 18 hours. If pipe A works for 3 hours and then pipe B alone finishes the work, how long will the total work take?

Correct Answer: 6 hours

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WhatsApp+91 99922 70404Math MCQ: Pipe A can fill a tank in 9 hours and pipe B in 18 hours. If pipe A works for 3 hours and then pipe B alone finishes the work, how long will the total work take? | Extra Education