Question
Train P travelling at 50 km/hr crosses another train Q,
having three fourth of its length and travelling in opposite direction at 40 km/hr in 14 seconds. Train P passed a railway platform in 36 seconds. Find the length of platform.Solution
Let the length of the first train is x metre Length of second train = 3x/4 Therefore, (50 + 40) x 5/18 = {x + (3x/4)}/14 ⇒ 90 x 5/18 = (7x/4)/14 ⇒ x = 200 m Therefore, let the length of the platform be y metre ⇒ 50 x 5/18 = (200 + y)/36 ⇒ 500 = 200 + y ⇒ y = 500 – 200 = 300 m
What is the purpose of a device driver in an operating system?
Which key combination is often used to permanently delete a file (bypassing Recycle Bin)?
Which of the following is NOT an example of e-mail service provider?
I. Outlook
II. Gmail
III. Yandex
Structured programming languages such as C, COBOL and FORTRAN were used in which of the following computers?
What is the primary function of a plotter?
The capacity of a CPU is measured.
COBOL is primarily used in which domain?
Which of the following is an example of software?
_______ type of malware that is designed to gain administrative level control over a computer system without being detected
What is the purpose of a search engine?
