Question
A group of workers was put on a job. From the second
day onwards, 1 worker left work everyday. If no worker was left when 52% of the work gets completed, find the number of workers in the group initially?Solution
Let x men doing a work and from second day onwards 1 worker left work, then wok will be completed in x days. x + x – 1 + x – 2 + ……….. x – n = x men Sum of n numbers(Sn) = n/2 [2a + (n -1)d] ⇒ x/2 [2 x + (x -1)(-1)] ⇒ x/2 [2 x – x + 1] ⇒ x/2 [x + 1] If no one would leave the work then, x/2 [x + 1] = x × x × 52/100 ⇒ x + 1 = 52x/50 ⇒ 50x + 50 = 52 x ∴x = 25
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:
