Number of total students = 8×16 = 128 Number of students in first 7 class rooms = 15+14+13+12+11+10+9 = 84 Students in 8th class room = 128-84 = 44
A boat can travel 26 km downstream in 30 min. The ratio of the speed of the boat in still water to the speed of the stream is 8: 5. How much time will t...
The downstream speed of a boat is 4 km/hr more than its upstream speed and the ratio of the speed of the boat in still water to the speed of the stream ...
A boat travels 30 km upstream and 40 km downstream. The speed of the stream is 5 km/h, and the boat’s speed in still water is 15 km/h. How much time d...
A swimmer swims from point P against the current for 6 minutes and then swims back along the current for the next 6 minutes and reaches point Q. If the ...
A boat covers a certain distance upstream in 6 hrs and comes back to starting point with current in 3 hrs, If boat's upstream speed is 15 km/hr, then, f...
Speed of a Motorboat in still water is 75kmph. If the motorboat travels 150 km along the stream in 1 hour 40 minutes, then the time taken by it to cover...
The speed of Boat is given as 20 km/hr and 28 km/hr while travelling to Upstream and downstream individually.Then, the boat travelled for ‘T’ hours ...
The speed of the current is 80% lower than the boat's speed in still water. The boat covers 120 km in still water in 8 hours. How long will it take for ...
Speed of a boat in still water to speed of boat in upstream is 13:10. If the boat can travel 320 km in downstream in 5 hours, then find the time taken b...
A Man Rows upstream 36 km and downstream 48 kilometers taking 6 hours each time the speed of the current is.
