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Downstream speed = 42/6 = 7 km/hr Upstream speed = 42/14 = 3 km/hr So speed of boat in still water = (7 + 3)/2 = 5 km/hr
When the bus moves at 3/4 of its usual speed, it is 20 minutes late. What is its usual time to cover the journey?
A boy goes to his school at 1/6th of the speed at which he returns from his school. Average speed during the whole trip (i.e. one round) is 24 km/h. Wha...
If a bus travel 15 km in 10 minute then how much time take if speed is decrease by 15 km/h?
Walking at 3/ 4 of his usual speed, a man is 1 1/ 2 hr late. His usual time to cover the same distance (in hours) is?
A bus takes 10 seconds to pass a standing man and 28 seconds to pass a traffic light, which is 405 meters long. Determine the time it takes for the bus ...
'A' and 'B' are running on a circular track of length 4500 metres. 'A' is running clockwise at 5 m/s while 'B' is running anti-clockwise at 7 m/s. Find ...
A and B are travelling towards each other with a speed of 15 km/hr and 30 km/hr. If they started at same time and A covered 25 km less distance than B b...
A boat travels 600 metres against the stream in 20 seconds and returns the same distance with the stream in 15 seconds. Determine the speed of the boat ...
