railway RRB Technician Grade 3 Mock Test 2024 Quantitative Aptitude Time and Work Work Efficiency

Parvesh is three times as efficient as Dinesh. Parvesh takes 20 days less than Dinesh to complete a book. If both of them work together, then in how many days will the book be completed?

1

7.5

2

8

3

10

4

6.5

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