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CBSE - Aptitude Mathematics

Aptitude Mathematics
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Aptitude Mathematics

A worker is digging a ditch. He gets 2 assistants who work 2/3 as fast as he does. If all 3 work on a ditch they should finish it in what fraction of the time that the worker takes working alone?
1. 3/7
2. 1/2
3. 3/4
4. 4/3

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Aptitude Mathematics