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Let the speed of the stream be 'x' km/hr Or, speed of boat in upstream = '3x' km/hr Or, speed of boat in still water = x + 3x = 4x km/hr Or, downstream speed of boat = 4x + x = 5x km/hr ATQ, (240/5x) + (240/3x) = 32 Or, (48/x) + (80/x) = 32 Or, (128/x) = 32 So, 'x' = 4 Speed of boat in still water = 4 X 4 = 16 km/hr Therefore, required time = (320/16) = 20 hours
X started to run from point ‘A’ to ‘B’ at a speed of 30 km/hr at 9:00 am and Y started to run from point ‘B’ to ‘A’ at a speed of 14 km/...
‘A’ and ‘B’ started moving towards each other at same time with a speed of 24 km/hr and 10 km/hr, respectively. If the distance covered by ‘Aâ...
'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 ...
In every 20minutes the time of a watch increases by 5 minutes. After setting the correct time at 5 am,What time will it show after 12 hours?
A diesel truck travelled for 10 hours with a speed of 35 km/h. If the truck travels for 5 km per 1 litre of diesel, then find the quantity of diesel use...
Average speed of ‘A’ during a 40-hour journey is 36 km/h. If he covered the first 160 km of his journey at a speed of 20 km/h, then find the speed a...
Find the distance travelled (in km) by the truck to reach point B from point A, if a car cover 45% the same distance in 2 hours 42 minutes and a truck c...
A man walks 4 km at a speed of 2 kmph, runs 6 km at a speed of 2 kmph and goes by bus another 32 km. Speed of the bus is 8 kmph. Find the average speed ...
A car travels at a speed that is 30 km/h faster than a bike's speed. The bike covers a distance of 750 km in 15 hours. Calculate the time it takes for ...
