Welcome to ixamBee
Continue with your mobile number
Let the speed of stream be x And speed of Boat be y Total time taken =80/(x+y) + 48/(x - y) = 20 ………………………. (i) And time taken for 30 km in downstream and 12 km in upstream is equal 30/(x + y) = 12/(x - y) 5x – 5y = 2x + 2y 3x = 7y x/y = 7/3 Now x = 7k and y = 3k Put the value of x and y in equation (i), 80/(7k + 3k) + 48/(7k - 3k) = 20 80/10k + 48/4k = 20 8/k + 12/k = 20 20/k = 20 k = 1 Therefore the speed of Boat in still water is 7 × 1 = 7 km/hr
An __________is system software that manages computer hardware and software resources and provides common services for computer programs.
Which of the following number system computer use to store data and perform calculations.
In which of the following group, Header and Footer can be found on the insert button while using PowerPoint?
______ is a mode the computer, monitor, or other device enters when idle for too long.
In MS Word, shortcut key Ctrl + Y will
____________ is a function of a firewall?
A __________ is a system designed to prevent unauthorized access to or from a private network
Which of the following memory is the permanent memory in your computer?
Which of the following is not an example of Database Management System?
An intranet that can be partially accessed by authorized outside users, enabling businesses to exchange information over the Internet in a secure way i...
