Question
A can do a piece of work in 24 days. B can do the same
work in 16 days and C can do the same work in 5/4th time required by both A and B together. A and B work together for 6 days, then C complete the remaining work. How many day did C work?Solution
=> (A + B) together = 48/5 day => C alone = (48/5) × (5/4) days = 12 days Remaining work = 48 – 5 × 6 = 18 C’s work = (18 × 12)/48 = 9/2 days
What is A's present age, if after 25 years his age will be 15 times his age 10 years back?
6 years ago, the ratio of the ages of Tara and Uma was 5:3. The present age of Sid is 14 years more than half of Uma’s present age. Find the present a...
There are four people P, Q, R and S. R and P are the oldest and youngest among them. Q is older than S. The present age of R is double the present age o...
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...
The average age of 66(2/3)% of the number of children in a group is 13 years. The average age of all the children in the group is 14.5 years. What is t...
Four years ago, the ages of A and B were in the ratio of 6:7. Twelve years from now, their ages will be in the ratio of 10:11. Calculate the average of ...
The ratio of the present ages of father and his son is 7:5. The product of their ages 3 years ago was 32 times of his son’s age that year. What was so...
The present age ratio of X and Y is 4:5. Also, the ratio of X’s age 7 years ago and Y’s age 6 years later is 1:2. Find their total current age.
A girl’s age is 125% of what it was 10 years ago, but 75% of what it will be after 10 years. What is her present age?
The current average age of 'Akhil', 'Bittu', and 'Chinu' is 42 years. 'Bittu's' age is 25% greater than 'Akhil's'. Twelve years from now, the age ratio ...
Relevant for Exams:
