Question
Which of the following statements correctly defines
groundwater recharge and extraction? 1. Recharge is the downward flow of water into underground aquifers. 2. Extraction refers to pumping water for irrigation and industrial use. 3. A high rate of recharge leads to water table decline.Solution
High extraction rates, not recharge, lead to water table decline.
Speed of a boat in still water is 18 km/h while the speed of the stream is ____ km/h. Total time taken by the boat to go 180 km upstream and 270 km down...
The speed of the boat A and B in still water are in the ratio 15:13. The speed of the current for both boats is 16 km/hr. If the sum of time taken by bo...
A boat can cover 176 km in downstream in 11 hours and 150 km in upstream in 15 hours. Find the speed of boat in still water
- The time to travel (x – 35) km upstream is the same as the time for (2x – 115) km downstream. Given the boat’s speed is 11 km/h and the stream’s sp...
A boat can travel 270 km downstream in 9 hours and 63 km upstream in 14 hours. Find the speed of the current.
A boat travels 200 km downstream in 10 hours. The difference between its downstream speed and upstream speed is 5 km/h. What is the ratio of the boat's ...
A boat travels downstream and then returns upstream but only up to 60% of the downstream distance. The total journey takes 18 hours. The downstream spee...
Find the total distance covered by boat in each upstream and downstream in 6 hours if the speed of boat in still water and speed of current is 20 km/h ...
The ratio of the speed of boat in upstream to speed of boat in downstream is 7:9. If the boat can cover a total of 70 km upstream and 90 km downstream i...
A boy can swim in water with a speed of 10 km/hr in still water. If the speed of the stream is 4 km/hr, what will be the time taken by the boy to cover ...
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