Question
Time taken by a boat to travel certain distance in
upstream direction is twice the time taken by the boat to cover same distance in downstream direction. If the total time needed to cover 24km upstream and 24km downstream is 3 hours, then calculate the average of speed of boat in still water and speed of stream.Solution
Let speed of boat in still water: u and speed of stream: v d/(u-v) = 2d/(u+v) => u = 3v 24/(u+v) + 24/(u-v) = 3 => v = 6km/hr Average of speed of still water and speed of stream = (u+v)/2 => 12
Which of the following Indian railways zones has launched India's longest electrified railway tunnel?
Which of the following is an example of public goods?
The government has approved laying a new broad-gauge railway line connecting Rameshwaram with _______________________
In which of the following institutes of Indian Railways are traffic officers trained?
Railway construction in India began in:
Who built India's first railway line?
Which of the following is India’s first green railway corridor?
The Length of Darjeeling Himalayan Railway is ___________________
Palace on Wheels is run by which state rail tourism?
Presentation of the first ever railway budget in India held in:
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