Question : 15 men can finish a piece of work in 40 days. The number of days after which 5 men should leave the work so that the work is finished in 45 days altogether is:
Option 1: 10
Option 2: 20
Option 3: 30
Option 4: 35
Correct Answer: 30
Solution :
Given: 15 men can finish a piece of work in 40 days.
Number of men to leave the work = 5
Let after $x$ number of days, 5 men left.
As per given condition,
$\frac{M_{1}D_{1}}{W_1}=\frac{M_{2}D_{2}}{W_2}$
$\frac{15\times (40-x)}{\text{Remaning work}}=\frac{10\times (45-x)}{\text{Remaning work}}$
⇒ $120 - 3x = 90 - 2x$
⇒ $x=30$
Hence, the correct answer is 30.
Related Questions
Know More about
Staff Selection Commission Combined Grad ...
Result | Eligibility | Application | Selection Process | Preparation Tips | Admit Card | Answer Key
Get Updates Brochure
Your Staff Selection Commission Combined Graduate Level Exam brochure has been successfully mailed to your registered email id “”.
Upcoming Exams
Trending Articles around SSC CGL
