Question
In a tennis tournament, each player played one game with
all the other players. How many players participated in the tournament if they played 300 games in all?Solution
According to the question, n C2 = 300, where n is the number of players (n(n - 1))/2 = 300 n2 - n - 600 = 0 n2 -25n + 24n - 600 = 0 n(n - 25) + 24(n - 25) = 0 (n - 25)(n + 24) n = 25
The ratio of speed of boat in upstream and in Stillwater is 1: 3 respectively. The boat takes a total of 10 hours to travel 300 kilometer in downstream ...
Speed of a boat in still water to speed of boat in upstream is 12: 11. If the boat can travel 260 km in downstream in 4 hours, then find the time taken ...
The speed of the stream is 14 km/h. Boat ‘A’ covers 64 km distance against the stream in 4 hours and boat ‘B’ covers 95 km distance against the ...
Speed of a boat in still water to speed of boat in upstream is 12:7. If the boat can travel 340 km in downstream in 5 hours, then find the time taken by...
- The boat's downstream and upstream speeds are 24 km/hr and 16 km/hr respectively. If the time taken to cover a distance of (x + y) km upstream with stream ...
The speed of a boat in still water is 2 times more than that of the current. If the boat takes 12 hours to cover 144 km upstream, then find the time tak...
A boat travels downstream and then returns upstream but only up to 60% of the downstream distance. The total journey takes 18 hours. The downstream spee...
A boat can travel 28 km downstream in 30 min. The ratio of the speed of the boat in still water to the speed of the stream is 5: 3. How much time will t...
A boat covers 13 km upstream in 52 min. If the speed of the current is 6 km / h, then in how much time will it cover 40 km downstream?
A boat can cover 176 km in downstream in 11 hours and 150 km in upstream in 15 hours. Find the speed of boat in still water
Relevant for Exams:
