Let the speed of the stream be x km/hr and both the boats meet after t hours According to the question, ⇒ (12 + x) t + (15 – x) t = 189 ⇒ 12t + 15t = 189 ⇒ 27t = 189 ⇒ t = 189/27 = 7 hours
A group of 7 friends had an average age of 24 years. When two new friends join the group, the average age of the group increases to 26 years. If the age...
Rohit's current age matches Rahul's age from 5 years earlier. If the age of Rohit 10 years from now will be the same as Rahul's age 5 years from now, wh...
Present age of ‘A’ is 40% more than that of ‘B’. If 11 years hence from now, ‘B’ will be 5 years younger than ‘A’, then find the sum of ...
Four years ago, the ratio of ages of a brother and sister was 5:6 respectively. 3 years from now, the age of the sister will be twice that of the brothe...
The ratio of A and B present age is 3:2. The product of their ages is 2400. What will be the ratio of their ages after 5 years?
In four years, the age ratio of 'X' and 'Y' will be 10:13, respectively. The current average age of 'Y' and 'Z' is 54 years, and the present average age...
M and S currently have ages in the ratio of 3:4. R's present age is 50% more than S's present age. The ratio of M's age one year from now to R's age thr...
The ratio of age of ‘B’ after 6 years from now and age of ‘C’ 4 years ago from now is 7:4, respectively. The present age of ‘C’ is 40% of th...
2n years ago, the age of Rahul was four times that of his son and n years ago, the age of Rahul was thrice that of his son. If n years later, the sum of...
Determine the ratio of the present ages of Chintu to Danny if, 12 years ago, the ratio of Sunita's age to Binita's age was 9:5, and Sunita's age, 6 year...
