Two trains are running in opposite direction with a speed of 62 km/hour and 40 km/hour respectively. If the length of one train is 250 meters and they cross each other in 18 seconds then what is the length of the other train? A) 145 meters B) 280 meters C) 260 meters D) None of these Solution Let the length of another train be L meters.Their relative speed = (62 + 40) km/hr = 102 x (5/18) = (85/3) m/sec∵ 250 + L/(85/3) = 18⇒ 3(250 + L)/85 = 18⇒ 250 + L = 510⇒ L = 260∴ Length of another train = 260 meters.
In Computer Science a device which encodes characters by the depression of Keys is known as? A) Printer B) Keyboard C) Mouse D) Hard Dvices
The computer program that contains instructions to operate a device is called? A) Device operator B) Device driver C) Device linking D) Device system
In MS Word, the Tool used for finding a similar word in a Document is called? A) Finder B) Thesaurus C) Dictionary D) Find / Replace
In MS-Word Home key moves the cursor to the? A) Beginning of the document B) Beginning of the paragraph C) Beginning of the screen D) Beginning of the line
An electronic path that sends signals from one part of the computer to another is a? A) Logic gate B) Modem C) Bus D) Serial port