It takes 10 men to finish a work in 2 days. Four (4) men started to execute the work, but after one (1) day, 3 of them left. How many days will it take the lone man to finish the remaining work?
A12 days
B14 days
C15 days
D16 days ✓ Correct
Correct answer: (D) 16 days
Explanation
The lone man needs 16 more days.
Total work = 10 x 2 = 20 man-days.
In 1 day, 4 men do 4 man-days, leaving 16 man-days.
After 3 leave, 1 man remains.
Remaining time = 16 / 1 = 16 days.
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