Ramesh can do a work in 21 days and Mahesh in 42 days. If they work on it together for 7 days, then what fraction of work is left?
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Q:
Ramesh can do a work in 21 days and Mahesh in 42 days. If they work on it together for 7 days, then what fraction of work is left?
- 1$$ {1\over5}$$false
- 2$$ {1\over4}$$false
- 3$$ {1\over2}$$true
- 4$$ {2\over3}$$false
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