Vimal can do a piece of work in 20 days, Vimal and Kamal together can do in 12 days. If Kamal does the work only for half a day daily then in how many days the work will be completed ?
A. 14
B. 17
C. 12
D. 15
Answer: Option D
Solution(By Examveda Team)
Vimal's 1 day work = $$\frac{1}{{20}}$$ Since, Vimal and Kamal can together complete in 12 days i.e. (Vimal + Kamal)'s 1 day work = $$\frac{1}{{12}}$$ Then, Kamal's 1 day work, $$ = \frac{1}{{12}} - \frac{1}{{20}} \Rightarrow \frac{2}{{60}} \Rightarrow \frac{1}{{30}}$$ If Kamal Works only for half a day daily, then his 1 day work becomes $$\frac{1}{2} \times \frac{1}{{30}}$$ = $$\frac{1}{{60}}$$ Therefore, 1 day work of both Vimal and Kamal, $$ = \frac{1}{{20}} + \frac{1}{{60}} \Rightarrow \frac{4}{{60}} \Rightarrow \frac{1}{{15}}$$ Hence, the work will be completed in 15 days.Related Questions on Time and Work
A. 18 days
B. 24 days
C. 30 days
D. 40 days
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