40 men can complete a work in 15 days. Five days after they started working, 10 more men joined them. In how many days will the total work be completed?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 13
40 men can complete a work in 15 days,
⇒Hence the total work will be done = 40 × 15
After 5 days,
⇒The work will be done = 40 × 10
Now the work 10 more men joined,
Work done, Men1 × Days1 = Men2 × Days2
40 × 10 = 50 × Days
⇒ Days = 8
Hence total number of days = 8 + 5 =13 days.