Question
The average of present ages of
Rajesh and his father is 45 years. The age of Rajesh 5 years hence from now will be 1/4 of the present age of his father. Find the present age of Rajesh's father.Solution
ATQ, Sum of present ages of Rajesh and his father = 45×2 = 90 years Let the present age of Rajesh be 'x' years. Then, present age of Rajesh's father = 90−x years. According to the question, (x+5)×4 = (90−x) 4x+20 = 90−x 5x = 70 x = 70/5 = 14 So, present age of Rajesh's father = 90−14 = 76 years.
A can do a piece of work in 15 days, B is 25% more efficient than A, and C is 40% more efficient than B. A and C work together for 3 days and then C lea...
Mohan, Sohan, and Rohan alone can finish a piece of work in 50, 100, and 150 days respectively. They start the work together, but Mohan leaves after 8 d...
A, B, and C can finish work in 5 days, 10 days, and 15 days, respectively, working alone. A and B work on the first day, A and C work on the second day,...
A team of 32 men and 28 women can complete a task in 60 days. When an additional eight men join the team, they are able to finish (4/5) of the same task...
A alone can complete 50% of a work in 20 days while B takes 16 days more than A to complete it. If B and C together can complete the work in 24 days, th...
Raju, Shubham, and Mohan can work for 15 days, 20 days and 25 days respectively. In how many days will the work be finished if they do it on alternate d...
Karan, Arjun and Krunal alone can complete a work in 50, 75 and 60 days respectively. All of them started working together but after 9 days from start K...
P alone can finish a piece of work ‘M’ in 6 days while Q takes 3 days to finish it alone. P, Q and R working together can finish the work &l...
- Ravi and Ramesh can do a job together in 20 days. They worked together for 12 days and then Suresh finished the remaining work alone in 10 days.Find how lo...
Ram can do a piece of work in 12 days and Shyam can do the same work in 20 days. They both started work together, Ram left 4 days before the completion ...
Relevant for Exams:
