Two pipes A and B can fill a cistern in `27 1/2` minutes and 35 minutes respectively. Both pipes are opened. The cistern will be filled in just 25 minutes, if the pipe B is turned off after:
Let the pipe B be turned off after x minutes Then, Part filled by (A + B) in x minutes + Part filled by A in (25 - x) minutes = 1 x(2/55 - 1/35) + (25 - x) x 2/55 = 1 x/35 = 1 - 50/55 x = 35/11 or 3(2/11) minutes
Which type of software is designed to help users perform specific tasks?
What type of virus uses computer hosts to reproduce itself?
Into how many parts is the MAC address divided?
Which security measure helps protect against unauthorized access to a computer system by requiring users to log in multiple times?
Which feature is used to edit the same text across multiple slides in LibreOffice Impress?
Which database is commonly used with LibreOffice Writer?
What is the full form of IVR?
How many languages are supported in LibreOffice 0.3?
What is the name of the viruses that fool a user into downloading and/or executing them by pretending to be useful applications?
What is the primary purpose of an operating system?
