8 men working for 9 hours a day complete a piece of work in 20 days. In how many days can 7 men working for 10 hours a day complete the same piece of work?
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Q:
8 men working for 9 hours a day complete a piece of work in 20 days. In how many days can 7 men working for 10 hours a day complete the same piece of work?
- 121 daysfalse
- 2$$ {20}{3\over 5}\ days $$false
- 3$$ {20}{1\over 2}\ days $$false
- 4$$ {20}{4\over 7}\ days $$true
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