Question
The present ages of 'A' and 'B' are in the ratio of
6:7. 20 years ago, A's age was 50% less than B's age at that time. Find the difference between their present ages.Solution
Let the present age of 'A' and 'B' be '6x' years and '7x' years, respectively. ATQ; (6x - 20) = 0.5 X (7x - 20) Or, 6x - 20 = 3.5x - 10 Or, 2.5x = 10 Or, x = 4 So, required difference = 7x - 6x = x = 4 years
The speed of a boat in still water is three times the speed of the boat upstream. If the boat takes 30 minutes to cover 27 km downstream, then find the ...
Speed of a boat in still water is three times the speed of the boat in upstream. If the boat takes 40 minutes to cover 15 km in downstream, then find th...
A boat travels 200 km downstream in 10 hours. The difference between its downstream speed and upstream speed is 5 km/h. What is the ratio of the boat's ...
A boy can swim a certain distance downstream in 5 hours and return in 7 hours. If the rate of stream is 3 kmph then what is the speed of boy in still wa...
A boy can swim in water with a speed of 12 km/hr in still water. If the speed of the stream is 5 km/hr, what will be the time taken by the boy to cover ...
- A boat covers a distance of 270 km downstream in 6 hours. If the boat's speed in upstream direction is one-third of its downstream speed, calculate the tim...
The speed of a boat in still water is 32km/hr and the speed of the current is 8km/hr. It takes a total of 15hours to row to upstream from Point A to B a...
A boat takes half time in moving a certain distance downstream than upstream. The ratio of the speed of the boat in still water and that of the current...
If the sum of upstream and downstream speed is 28 km/hr and the speed of the current is 6 km/hr. Then find time taken to cover 50 km in downward?
A man rows upstream 10 km and downstream 15 km taking 5 hours each. Find the man’s speed in still water.
...
Relevant for Exams:
