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Let the downstream speed and upstream speed be ‘4x’ km/h and ‘3x’ km/h, respectively. According to question, 64/4x + 60/3x = 9 16/x + 20/x = 9 36/x = 9, x = 4 So, the downstream speed and upstream speed is 16 km/h and 12 km/h, respectively. Speed of stream = (16 – 12)/2 = 2 km/h
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If a person walks 25% more than of his usual speed, reaches his distance 90 minutes before. If the destination is 495 km away, then the usual speed of a...
X started to run from point ‘A’ to ‘B’ at a speed of 28 km/hr at 9:00 am and Y started to run from point ‘B’ to ‘A’ at a speed of 12 km/...
A 120-meter-long train crosses a pole in 6 seconds. How much time will it take to cross a 180-meter-long platform?
A bus was travelling from Jaipur to Udaipur was delayed by 15 minutes and made up for the delay on a section of 85 km travelling with a speed 12 km per ...
Howrah Express is scheduled to reach Howrah at 8:00 am, but due to the high number of trains the train couldn't get clearance for platform, and it got s...
A motor-cycle covers 90 km with a speed of 40 km/hr. find the speed of the motor-cycle for the next 90 km journey so that the average speed of the whole...
