Question
In general, the problems ascribed to be created by the
use of chemical fertilizers include(s):Solution
Excess use of fertilizers leads to decrese in productivity and fertility of soil.Â
A man can row 5 km/hr in still water. If the speed of the current is 2 km/hr, it takes 4 hours more in upstream than in the downstream for the same dist...
The speed of current is 8 km/h. What will be the respective downstream speed and upstream speed of a boy rowing a boat, if one fifth of the distance cov...
Speed of a boat in still water is 10 kmph and speed of stream is 6 kmph. A man rows to a place at a distance of 32 km and come back to starting point. T...
A boat can cover 120 km in upstream in 6 hours and 180 km in downstream in 3 hours. Find the speed of the stream.
A man can row at 4 kmph in still water. If the velocity of current is 2 kmph and it takes him 8 hour to row to a place and come back, how far is the place?
A Swimmer Walks 45km along the river's flow in 3 hours 45 minutes and walks 15km against the flow in 2 hours 30min. Find the speed of the boat in Still ...
Speed of a ship is 6 m/s, which increases by 2 m/s after every 5 minutes. It travels upstream for 15 minutes and then travels downstream for 15 minutes....
If a river is flowing at a rate of 6 km/hr and a boat's speed in still water is 100% higher than the river's speed, and the boat travels 'd' kilometers ...
A boat takes 24 hours to cover 'q' km in still water. While traveling downstream, it takes 16 hours to cover (q - 80) km. If the speed of the boat in st...
- A boat covers a distance of 270 km downstream in 6 hours. If the boat's speed in upstream direction is one-third of its downstream speed, calculate the tim...
