A, B और C किसी कार्य को क्रमशः 20, 30 और 60 दिनों में कर सकते हैं। यदि A को हर तीसरे दिन B और C दोनों द्वारा सहायता मिलती है तो A कितने दिनों में कार्य कर सकता है?

This question was previously asked in
SSC CGL 2023 Tier-I Official Paper (Held On: 27 Jul 2023 Shift 2)
View all SSC CGL Papers >
  1. 10
  2. 15
  3. 12
  4. 18

Answer (Detailed Solution Below)

Option 2 : 15
vigyan-express
Free
PYST 1: SSC CGL - General Awareness (Held On : 20 April 2022 Shift 2)
3.6 Lakh Users
25 Questions 50 Marks 10 Mins

Detailed Solution

Download Solution PDF

दिया गया है:

A किसी कार्य को अकेले कर सकता है = 20 दिन में

B अकेले उसी कार्य को कर सकता है = 30 दिन में

C अकेले उसी कार्य को कर सकता है = 60 दिन में

प्रयुक्त सूत्र:

\(Work = Efficiency × Time\)

गणना:

A की दक्षता = \( {1\over 20}\)

B की दक्षता = \( {1\over 30}\)

C की दक्षता = \( {1\over 60}\)

A का दो दिन का कार्य = \({2\over20}={1\over10}\)

तीसरे दिन A, B और C द्वारा एक साथ किया गया कार्य = \({1\over20}+{1\over30}+{1\over 60}={3+2+1\over60}={6\over60}={1\over 10}\)

प्रथम तीन दिन का कार्य = \({1\over 10}+{1\over10}={2\over10}={1\over5}\)

उनके द्वारा 3 दिनों में 20% कार्य पूरा किया गया।

पूरा कार्य वे 3 × 5 = 15 दिन में पूरा कर सकते हैं

∴ अभीष्ट परिणाम 15 दिन का होगा।

Latest SSC CGL Updates

Last updated on Jun 13, 2025

-> The SSC CGL Notification 2025 has been released on 9th June 2025 on the official website at ssc.gov.in.

-> The SSC CGL exam registration process is now open and will continue till 4th July 2025, so candidates must fill out the SSC CGL Application Form 2025 before the deadline.

-> This year, the Staff Selection Commission (SSC) has announced approximately 14,582 vacancies for various Group B and C posts across government departments.

->  The SSC CGL Tier 1 exam is scheduled to take place from 13th to 30th August 2025.

->  Aspirants should visit ssc.gov.in 2025 regularly for updates and ensure timely submission of the CGL exam form.

-> Candidates can refer to the CGL syllabus for a better understanding of the exam structure and pattern.

-> The CGL Eligibility is a bachelor’s degree in any discipline.

-> Candidates selected through the SSC CGL exam will receive an attractive salary. Learn more about the SSC CGL Salary Structure.

-> Attempt SSC CGL Free English Mock Test and SSC CGL Current Affairs Mock Test.

-> Candidates should also use the SSC CGL previous year papers for a good revision. 

More Work Efficiency Questions

More Time and Work Questions

Get Free Access Now
Hot Links: teen patti sweet happy teen patti teen patti baaz