Question
Download Solution PDF63 men can complete a piece of work in 30 days. In how days can 21 men complete the same piece of work?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
63 men can complete a piece of work in 30 days.
Formula used:
Work = Number of men × Number of days
Calculation:
Work done by 63 men in 30 days = 63 × 30
⇒ Work = 1890 man-days
Let the number of days required for 21 men to complete the same work be x.
⇒ Work done by 21 men in x days = 21 × x
Since the work is the same, we can set up the equation:
21 × x = 1890
⇒ x = 1890 / 21
⇒ x = 90
∴ The correct answer is option (2).
Last updated on Jun 24, 2025
-> The CSIR Junior Secretariat Assistant 2025 has been released for 9 vacancies.
-> Candidates can apply online from 17th June to 7th July 2025.
-> The CSIR JSA salary ranges from INR 19,900 - INR 63,200 (Indian Institute of Petroleum, Dehradun & Institute of Microbial Technology) and INR 35,600 (Indian Institute of Toxicology Research).
-> The selection of candidates for this post will be based on a Written Exam, followed by a Computer Typing Test.
-> Prepare for the exam with CSIR Junior Secretariat Assistant Previous Year Papers.