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X Y and Z can do a piece of work in...

This question belongs to Arithmetic Ability Time And Work
Time and Work
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X, Y and Z can do a piece of work in 46 days, 92 days and 23 days, respectively. X started the work. Y joined him after 2 days. If Z joined them after 8 days from the beginning, then for how many days did X work?

Answer & Solution
Correct Answer: Option C
Time and Work mcq question image
2 days work of X = 2 × 2 = 4
After Y joined X and Y work 6 days = 3 × 6 = 18
After 8 days from begging - X, Y and Z work together $$ = \frac{{92 - 22}}{7} = \frac{{70}}{7} = 10{\text{ days}}$$
Total days work of X = 10 + 8 = 18 days
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