Question
A and B together can complete a task in 12 days. B alone
can complete it in 20 days. How long will it take A to complete the task if he works alone?Solution
Let the total work be 1 unit of task. Work rate of A and B together = 1/12 units per day Work rate of B alone = 1/20 units per day Work rate of A alone = 1/12 − 1/20 = (5 − 3) / 60 = 2/60 = 1/30 units per day Therefore, A alone will complete the task in 30 days. Correct answer: a) 30 days
Among seven students S, T, U, V, W, X and Y. X is heavier than Y but lighter than V. U is heavier than T. S is the heaviest. T is fourth heaviest. W is ...
E, F, G, H and I are five sisters. G is younger than only two sisters. F is older than E but younger than G. I is not the oldest. Who is the oldest?
Six students L, M, N, O, P, and Q scored different marks in an exam. O scored more than Q and L. Three students scored more than P, who scored just mor...
If the weight of K and L are 45 Kg and 30 Kg respectively then how many persons are heavier than K?
Which of the following student is second tallest student?
Five persons F, R, G, W, and Y have different heights. F is taller than Y but shorter than W. G is shorter than F. R is the shortest among all. Who amon...
Which box is fourth heaviest?
N is heavier than O. R is lighter than Q. P is heavier than Q but lighter than O. Who among them is heaviest?
Six persons P, Q, R, S, T and U are of different ages. S is older than only T and R. Q is older than P but younger than U. R is not the youngest. The ag...
If J has 25 balls and N has 9 balls more than J, then what cannot be the possible number of balls O has?Â
