Interview Preparation
- Interview Preparation For Software Developers
- Must Coding Questions - Company-wise
- Must Do Coding Questions - Topic-wise
- Company-wise Practice Problems
- Company Preparation
- Competitive Programming
- Software Design-Patterns
- Company-wise Interview Experience
- Experienced - Interview Experiences
- Internship - Interview Experiences
Commerce
- Commerce
- Class 11 Accountancy Notes
- Class 12 Accountancy Notes
- Accountancy
- Class 11 Business Studies Notes
- Class 12 Business Studies Notes
- Business Studies
- Class 11 Microeconomics Notes
- Class 11 Statistics For Economics Notes
- Class 12 Macroeconomics Notes
- Class 12 Indian Economic Development Notes
- Economics
- Management
- Income Tax
- Finance
QA - Placement Quizzes | Pipes and Cisterns | Question 6
Three pipes A, B and C were opened to fill a cistern. Working alone, A, B and C require 12, 15 and 20 minutes respectively. Another pipe D, which is a waste pipe, can empty the filled tank in 30 minutes working alone. What is the total time (in minutes) taken to fill the cistern if all the pipes are simultaneously opened ?
(A)
5
(B)
6
(C)
7
(D)
8
Answer
Please comment below if you find anything wrong in the above post
Feeling lost in the world of random DSA topics, wasting time without progress? It's time for a change! Join our DSA course, where we'll guide you on an exciting journey to master DSA efficiently and on schedule.
Ready to dive in? Explore our Free Demo Content and join our DSA course, trusted by over 100,000 geeks!
Last Updated :
Share your thoughts in the comments
GeeksforGeeks