P and Q can do a work in 4 hours and 12 hours respectively. P starts the work at 9am and they work alternately for one hour each. When will the work be completed ?5
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Q: P and Q can do a work in 4 hours and 12 hours respectively. P starts the work at 9am and they work alternately for one hour each. When will the work be completed ?
- 13 amfalse
- 212 pmfalse
- 31 pmfalse
- 43 pmtrue
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