40 men can complete a piece of work in 18 days. Eight days after they started working together, 10 more men joined them. How many days will they now take to complete the remaining work ?
A. 6 days
B. 8 days
C. 10 days
D. 12 days
Answer: Option B
Solution(By Examveda Team)
Let D days required to complete the remaining work$${40_{{\text{men}}}} \times {18_{{\text{days}}}}$$ = $$\left( {{{40}_{{\text{men}}}} \times {8_{{\text{days}}}}} \right)$$ + $$\left( {{{50}_{{\text{men}}}} \times {\text{D}}} \right)$$
$$\eqalign{ & \Rightarrow 720 - 320 = 50{\text{D}} \cr & \Rightarrow {\text{D}} = 8 \cr} $$
Related Questions on Time and Work
A. 18 days
B. 24 days
C. 30 days
D. 40 days
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