Question
6 years ago, the ratio of the ages of A and B was 2:3
and after 5 years it will become 5:7. Find their present ages.Solution
6 years ago, Let the ratio of ages of A and B = 2x:3x According to the question, => (2x + 11)/(3x + 11) = 5/7 => 14x + 77 = 15x + 55 => x = 22 Present age of A = 2x + 6 = 50 years Present age of B = 3x + 6 = 72 years
A motor boat goes downstream from point A to B ,which is 36 km away from point A, and then returns to A.If actual speed of the boat in still water is 7...
A boat travels 42 km against the current and 72 km with the current in a total time of 8 hours. Additionally, it covers a distance of 56 km in still wat...
A boat takes 1/12th time in moving a certain distance downstream than upstream. The ratio of the speed of the boat in still water and that of the curren...
- A boat covers (x – 20) km upstream in the same time it covers (2x – 95) km downstream. If the speed of the boat and stream are 15 km/h and 3 km/h respe...
- The speed of a boat in still water is 8 km/hr, and the speed of the current is 3 km/hr. If the boat takes a total of 10 hours to travel ‘x’ km both ups...
Speed of a boat in still water is 9 kmph and speed of stream is 6 kmph. A man rows to a place at a distance of 30 km and come back to starting point. Th...
A boat takes 20 hours to cover 'n' km in still water. While traveling downstream, it takes 15 hours to cover (n - 50) km. If the speed of the boat in st...
A boat travels 40 km downstream in 5 hours, and the same boat travels 40 km upstream in 8 hours. Find the speed of the boat in still water.
Two boats A and B start towards each other from two places, 660 km apart. Speed of the boat A and B in still water are 30 km/h and 25 km/h respectively....
- A boat goes downstream at 28 km/hr and upstream at 20 km/hr. If it takes 14 hours to travel (x + y) km upstream when the stream speed is doubled, then what...
Relevant for Exams:
