Which of the following is a primary source of energy for most power plants?
Coal
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 7:4:2, respectively. If ...
The speed of a boat in still water is 11 times the speed of the stream. If the difference between the upstream and downstream speed of the boats is 20 k...
Ratio of distance covered by boat in upstream to downstream is 4:3. Time taken in downstream and upstream is 2hr and 4 hr respectively. If speed of boa...
When travelling downstream, a boat takes 5.25 hours to travel 252 km. If the speed of the stream is (3/8)th of downstream speed of the boat, ...
A car can cover a ‘2d’ km distance at the speed of ‘B’ km/h in 30 hours. The speed of the boat in still water and the speed of the stream are â€...
Find the total distance covered by boat in each upstream and downstream in 8 hours if the speed of boat in still water and speed of current is 26 km/h a...
A boat can cover ‘y’ km distance downstream in (t+2.5) hours. The same boat can cover ‘0.25y’ km distance upstream in ‘t’ hours. The time ta...
The speed of current is 4 km/h. What will be the respective downstream speed and upstream speed of a boy rowing a boat, if half of the distance covered ...
A boy can swim a certain distance downstream in 2 hours and return in 5 hours. If the rate of stream is 3 kmph then what is the speed of boy in still wa...
A man can row one quarters of a kilometer against the stream in 30/4 minutes and return in 5/2 minutes. The speed of the man in still water is:
