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A's work rate: A completes 60% of the work in 36 days. A completes the full work in 36/0.6= 60 days. A's daily work rate is 1/60 B's work rate: B takes 30 days more than A, so B completes the work in 60+30 = 90 days. B's daily work rate is 1/90 . Combined work rate of B and C: B and C together complete the work in 40 days. Their combined daily work rate is 1/40. Find C's work rate: Let C's daily work rate be 1/C Combined rate equation: 1/90+1/C=1/40 Solve for 1/C : Time taken by C alone: C completes the work in 72 days. Therefore, C alone takes 72days to complete the work.
Five years ago from now, the ages of 'A' and 'B' were in the ratio 31:17, respectively. Fifteen years ago from now, the ages of 'A' and 'B' were in the ...
When 15 years ago age of Dev was divided by 20, the present age of his granddaughter Swati is obtained. If Swati is 6 years younger than her sister Neha...
The ages of A, B and C together are 60 years. B is thrice as old as A and C is 5 years older than A. What is the difference between ages of B and C?
The average of present ages of 'Anna', 'Bob', and 'Charlie' is 20 years. Three years ago, the average of ages of 'Bob', 'Charlie', and 'David' was 15 ye...
Shalini is younger than Rashi by 3 years. If the ratio of Shalini and Rashi ages is 4:5 respectively, then find the age of Shalini.
In an office, there are 18 employees. The average age of all the employees is 28 years. If the age of three senior managers is included, then the averag...
P's present age is 30% less than what her husband's age will be 8 years from now. If 3 years ago, the sum of their ages was 37 ye...