Question : 40 men can complete a work in 18 days. Eight days after they started working together, 10 more men joined them. How many days will it now take to complete the remaining work?
Option 1: 6
Option 2: 8
Option 3: 10
Option 4: 12
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Correct Answer: 8
Solution :
Total work = 40 × 18 = 720 units
Work done for 8 days by 40 men = 320 units
$\therefore$ Remaining work = 720 – 320 = 400 units
400 units of work are done by 50 men.
Thus, the remaining work is completed in $\frac{400}{50}$ = 8 days
Hence, the correct answer is 8.
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