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Let speed of boat in still water: u and speed of stream: v d/(u-v) = 2d/(u+v) => u = 3v 24/(u+v) + 24/(u-v) = 3 => v = 6km/hr Average of speed of still water and speed of stream = (u+v)/2 => 12
Present ages of P and Q are in the ratio 2:3 respectively. If Q’s age, 8 years hence from now will be 2 times of P’s age, 6 years ago from now, then...
A girl’s age is 125% of what it was 5 years ago, but 75% of what it will be after 5 years. What is her present age?
A is 3 years older than B while C is 4 years younger than B. The ratio of age of A, 8 years hence and age of B, 6 years ago is 5:4. What was age of C, 1...
The ratio of the present age of A to that of B is 7:9. Six years ago the ratio of 1/3 of A’s age at that time and 1/3 of B’s age at that time was 1:...
Novita's current age is 37.5% greater than Suzuka's, with a difference of 15 years between their ages. Calculate the ratio of Novita's age to Suzuka's a...
P got married 8 years ago. His present age is 5/3 times his age at the time of his marriage. P’s sister was 10 years younger to him at the time of...
Present average age of 4 friends: ‘A’, ‘B’, ‘C’ and ‘D’ is 30 years. If their ages are in the arithmetic progression in the same order a...