Eight persons can finish a work in 20 days. After 5 days they were requested to complete the work in the next 8 days. How many more persons should join the group to fulfil the requirement?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e 7
8 person can complete a work in 20 days. So, total units of work = 8 × 20 = 160 units
ATQ, they work for 5 days. So, units of work completed = 8 × 5 = 40 units
Units of work remaining = 160 - 40 = 120 units
120 = 8 × p , where p = no of persons
⇒ p = 15
So, 7 more persons should join the group to complete the work on time.