Question
Which of the following is water borne
disease?Solution
The protozoa, bacteria, and nematodes cause diseases by contaminating the water. One example of such disease is cholera. It is caused by consuming water which is being contaminated with bacterium Vibrio cholerae.
A boy can swim a certain distance downstream in 3 hours and return in 7 hours. If the rate of stream is 4 kmph then what is the speed of boy in still wa...
The current age of 'N' is 25% more than the current age of 'M'. The present age of 'P' is the average of the present ages of 'M' and 'N'. Three years fr...
The ratio of the speed of boat ‘A’ in still water, the speed of boat ‘B’ in still water and the speed of the current is 11:5:2, respectively. If...
Speed of a boat in still water is 9 km/hr. It goes 12 km downstream and comes back to the starting point in three hours. What is the speed of water in t...
Speed of a boat in still water to speed of boat in upstream is 8:5. If the boat can travel 440 km in downstream in 5 hours, then find the time taken by ...
Boat speed in still water = 12 km/h, stream speed = 3 km/h. Time to go 30 km downstream and return 30 km upstream?
A boat goes 240 km downstream in 12 hours, and 160 km upstream in 16 hours. The speed of the stream is Â
The Ship's speed in calm water exceeds that of the current by 20%. After sailing downstream for 4 hours, it traveled upstream for 4 hours with an increa...
If the sum of upstream and downstream speed is 30 km/hr and the speed of the current is 5 km/hr. Then find time taken to cover 40 km in downward?
- The ratio of the boat's speed in still water to the speed of the stream is given as 16:4. The boat takes a total time in the ratio 10:7 to travel (d + 120)...
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