Question
A is cycling at an average speed of 20 km/hr such that
he can reach a certain point at 12 noon. If he cycles at 30 km/hr, then he will reach the destination at 10 a.m. At what speed he should cycle to reach the destination at 11 a.m.Solution
Let the distance to be travelled be ‘x’ km Time taken when speed is 20 km/hr = (x/20) hours Time taken when speed is 30 km/hr = (x/30) hours According to the question, (x/20) – (x/30) = 2 Or, 3x – 2x = 2 × 60 Or, x = 120 km Time taken to travel 120 km with speed of 20 km/hr = 120/20 = 6 hours Therefore, he started at 12 – 6 = 6 a.m. Therefore, required speed to reach the destination at 11 a.m. or 5 hours = 120/5 = 24 km/hr
What is the primary objective of system testing in the software development lifecycle?
Which of the following element in XSLT is used to apply a template repeatedly on each node?
Consider the following Java code:
  public class Product {
    private String name;
    private double price;
The precision is composed of which of the following two characteristics?
Which of the following is NOT a typical step in NLP text preprocessing?
Which of the following statements best describes the role of the JDBC package in Java programming?
Which statement is FALSE about open loop system?
What is Computer Output Microfilm (COM) primarily used for in data management and archival systems?
Complete the Java code to replace all occurrences of a specific word (case-insensitive) in a string.
public class RegexReplacer {
  pu...
A Decision Support System (DSS) is best described as:
Relevant for Exams:
