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India ranks 177th among 180 countries in the Environment Protection Index. Switzerland tops the list. China is at 120. Last year India's rank was 141.
Ratio of speed of boat in downstream and speed of stream is 7:3, if speed of current is 9 km/hr, then find distance travelled (in km) upstream in 6 hours.
A boat goes 200 km downstream in 50 hours, and 90 km upstream in 30 hours. The speed of the stream is
A captain can navigate a ship at a speed of 5 km/hr in calm waters. With a current moving at a speed of 3 km/hr, he takes 12 hours longer to travel 'd' ...
The speed of current is 26 km/hr. If the speed of the boat in still water had been 12 km/hr more than the original speed then it would take 7.5 hours to...
The speed of a boat in still water is 7 km/hr and the speed of the stream is 2.5 km/hr. A man rows to a place at a distance of 42.75 km and comes back t...
The income of ‘A’ increases by 20% every year. If his income 3 years hence from now will be Rs. 13478.4, then find his income a year before from now...
A boat can cover a distance of 64 km downstream in 4 hours less time than it takes to travel the same distance upstream. If the current of the stream fl...
A boat travels 48 km downstream in 4 hours and 24 km upstream in 6 hours. What is the speed of the boat in still water?
Speed of a boat in still water is 15 kmph and speed of stream is 13 kmph. A man rows to a place at a distance of 56 km and come back to starting point. ...
Speed of a boat in still water is three times the speed of the boat in upstream. If the boat takes 44 minutes to cover 22 km in downstream, then find th...
