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Tools help us d do work with less...

Tools help us d do work with less _________

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The correct Answer is:
effort
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Tools used to make article or to repair them are called _________

Select the correct option which best suits the given descriptions for P, Q, R and S. P - A simple tool used for removing weeds. Q - A tool that is used for ploughing the field. R- A tool that is used for sowing with the help of tractor. S - A simple tool used for cutting of crops.

G is twice as fast as S in doing work. If G can do a work in 30 days less than S, how many days will they take to complete the work together?