Question
Which of the following is NOT a major factor affecting
the population change in a region?Solution
Population change, defined generally, is the difference in the size of a population between the end and the beginning of a given time period (usually one year). The main components of population change are births, deaths, and migration.
Speed of a boat in still water is three times the speed of the boat in upstream. If the boat takes 25 minutes to cover 25 km in downstream, then find th...
A man can row at 6 kmph in still water. If the velocity of current is 3 kmph and it takes him 8 hour to row to a place and come back, how far is the place?
Boat ‘A’ can cover 150 km in still water in 15 hours. In still water, if the ratio of the speed of boat ‘A’ to that of ‘B’ is 5:1 and the sp...
A man rows a boat a certain distance downstream in 9 hours, while it takes 18 hours to row the same distance upstream. How many hours will it take him t...
A boat’s speed in still water is 1.5 times the speed of the current. It takes the boat 22.5 hours to travel 90 km upstream. If ...
When travelling downstream, a boat takes 7 hours to travel 280 km. If the speed of the stream is (2/5)th of downstream speed of the boat, the...
The ratio of speed of the boat and the speed of the current is 6:5. If the downstream speed of the boat is 44 km/hr. Then find how much distance will th...
A boat takes 2 hours to travel 24 km downstream and 4 hours to travel 16 km upstream. What is the speed of the boat in still water?
A man takes 10 hours to row 21 km upstream from point A to point B and back to A by boat. If he takes the same time to row 7 km downstream as upstream. ...
A man can row his boat with the stream at 42 km/h and against the stream in 7 km/hours. The man’s rate is
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