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A farmercan rupa field in 20 days while his wife can do it in 30 days. If they work together,how much time can they reap the field? |
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Answer» Answer: farmer=30 days wife=20 days EFFICIENCY= total work/ days farmer=60/30=2 wife=60/20=3 total days=total work/total efficiency =60/5 =12 days
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