Question
A man can row at a speed of 20 km/hr in still water to a
certain upstream point and back to the starting point in a river which flows at 5 km/hr. Find his average speed for total journey.Solution
Speed of the man in still water = 20 km/hr Speed of the stream = 5 km/hr Speed downstream = (20 + 5) = 25 km/hr Speed upstream = (20 - 5) = 15 km/hr Average speed = (Speed downstream x Speed upstream)/Speed in still water = (25 x 15)/20 = 18.75 km/hr
Which device is primarily used for storing permanent data in a computer?
What is full form CMOS ?
What is 'Cloud Computing'?
Which type of commands in MS-DOS needs external files to perform their action?
Which shortcut allows moving to the beginning of a document?
Which technology is used in a "Voice Assistant" like Siri or Alexa?
Which of the following is a characteristic of third-generation computers?
With respect to computers, which one of the following best describes phishing?
The speed of which generation computer was in Pico Seconds?
What is the main function of an operating system?
Relevant for Exams:
