Question
Train ‘A’ running with a speed of 54 km/hr can cross
a standing goods train of 4 times its length in 30 seconds. Find the time taken by 310 metres long train ‘B’ which is coming from opposite direction of train ‘A’, with a speed of 20 m/s, to cross train ‘A’.Solution
Let the length of train ‘A’ be ‘x’ metres Therefore, length of the goods train = ‘4x’ metres Speed of train ‘A’ = 54 × (5/18) = 15 m/s According to the question, 4x + x = 15 × 30 => 5x = 450 => x = 90 Therefore, time taken by train ‘B’ to cross train ‘A’ = {(90 + 310)/(30 + 20)} = 8 seconds
A Backup refers to
What is the shortcut key for inserting ‘Hyperlink’?
What is the primary purpose of using a watermark on a digital document or image?
What is WebKit?
Which of the following define a page break?
Which of the following components is responsible for temporarily storing data and instructions directly accessible to the CPU?
Most digital cameras store photos in ________________ format, because then you can take more photos on one camera card than you can with other formats, ...
What is two-factor authentication (2FA)?
Which layer transmits data between the systems by ‘packet’ level?
The file extension of MS-Word document in Office 2007 is_______.
