Question
‘A’ alone can complete a work in 50 hours. ‘A’
started the work alone and left after working on it for 10 hours. If ‘B’ completed the rest of the work in 10 hours then find the time taken by ‘A’ and ‘B’ together to complete the whole work.Solution
Let the total work = 250 units Then, efficiency of ‘A’ = (250/50) = 5 units/hour Work completed by ‘A’ alone in 10 hours = 5 × 10 = 50 units Remaining work = 250 – 50 = 200 units So, efficiency of ‘B’ = 200/10 = 20 units/hour Therefore, combined efficiency of ‘A’ and ‘B’ = 20 + 5 = 25 units/hour So, time taken by ‘A’ and ‘B’ together to complete the work = (250/25) = 10 hours
P, F’s father, has a grandchild, Vartika is the mother of K who has a son N, but K is not the daughter. K has a brother. Vartika and P are married...
How is U related to X?
How is P related to the mother of R?
How is D related to G?
. As per which of the following expressions means S is the uncle of Q?
Answer the questions based on the information given below.
In a family of three generation, there are eight members M, N, O, P, Q, R, S and T. ...
How is F related to C?
How is W related to T?
Introducing Meenakshi, Ramsingh says, "She is the sister of the son of my mother's sister". How is Meenakshi related to Ramsingh ?
In a family, I is sister of G. L is father-in-law of N. N is mother of G. H is daughter of G’s mother. K is the only son of L. How is I related to L?
