Question
A can complete a piece of work in 12 days, B in 18 days,
and C in 36 days. They all work together for a few days, after which A leaves. B and C continue working and finish the remaining work in 3 days. How many days did they all work together initially?Solution
Let the total work be 1 unit. A’s efficiency = 1/12, B’s efficiency = 1/18, and C’s efficiency = 1/36. Let them work together for x days. Work done in x days = (1/12 + 1/18 + 1/36) × x = (12/72) × x = x/6. Remaining work = 1 - x/6 = 5x/6 B and C finish the remaining work in 3 days: Remaining work = (1/18 + 1/24) × 3 = (7 × 3)/72 = 21/72 Now, 1 - 5x/6 = 21/72. 5x/6 = 1 - 21/72 = 51/72 = 17/24 x = 17/20 = 0.85 days. Final Answer: (b) 0.85 days
What's the name of the technology that the Chrome browser uses to keep you safe from malware and phishing?
HTML stands for
Which of these options will keep your online information safest?
A basic computer network can be described as:
Which of the following define a page break?
Which of the following combinations of the keys are used to restart the computer?
_______________ can detect computer files whose contents are broken across several locations on the hard disk, and move the fragments to one location ...
In database, a fields is a
_______ is the execution of data in a short time period, providing near-instantaneous output
What in-house creation did Google use as a programming interface for Chrome before making the shift to HTML5?
Relevant for Exams:
