Let the total work be 60 units (L.C.M of 20, 15 and 10) Efficiency of A = 60/20 = 3 units/day Efficiency of B = 60/15 = 4 units/day Efficiency of C = 60/10 = 6 units/day Amount of work completed by B and C in 3 days = (6 + 4) × 3 = 30 units Time taken by A to complete the remaining work alone = (60 – 30)/3 = 10 days
Six years ago, the age of 'R' compared to the age of 'M' six years from now was in the ratio 4:7. If the current average age of 'R' and 'M' is 33 years,...
The current age of Mike is four that of Nancy. 3 years from now, Mike's age will be two times the age of Owen at that time. If Nancy is 6 years younger ...
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 ...
Present ages of 'A' and 'B' are in the ratio 3:5, respectively. If B's age, 11 years hence from now will be 5 times of A's age, 18 years ago from now, t...
The ratio of the present age of mother and son is 11:5. 5-years ago the father's age was 5 years less than thrice the age of son and 6 years hence the a...
A is as much older than V as he is younger than K. In 4 years from now, the ratio of the ages of V and K will be 5:9. Also, in 6 years, A's age will be ...
The present age of a mother is 4 times that of her daughter. After 12 years, the mother’s age will be 1 year more than twice the daughter’s age. Fin...
Currently, Mandeep is 25% older than Sandeep. Four years from now, the combined ages of Mandeep and Sandeep will total 53 years. Given that Ramandeep's ...
18 years ago the average age of a family of four members was 45 years. Two children were born in that span of 18 years. The present average age of the f...
The heights (in cm) of 9 basketball players in a tournament are as follows: 178, 182, 175, 180, 184, 179, 177, 181, 183
Find the median height of...
