Question
Pipes ‘A’ and ‘B’ can fill a tank in 6 hours and
9 hours, respectively. If pipe ‘C’ is opened along with pipes ‘A’ and ‘B’, then the tank gets filled in 9 hours. Find the time taken by pipe ‘C’ to empty (3/4)th part of the same tank.Solution
Let capacity of the tank = 18 litres (lcm of 6 and 9) Efficiency of pipe ‘A’ = (18/6) = 3 litres/hour Efficiency of pipe ‘B’ = (18/9) = 2 litres/hour Efficiency of all the three pipes together = (18/9) = 2 litres/hour Efficiency of pipe ‘C’ = 2 – (3 + 2) = (-3) litre/hour {Negative sign shows that pipe ‘C’ is an outlet pipe} Required time taken = {(3/4) × 18)}/3 = 4.5 hours
Four of the following five are alike in a certain way and so form a group. Which is the one that one doesn’t belong to that group?
The person who likes Grapes goes to which country?
How many seminars are conducted between seminars of C in afternoon and her seminar in pre-noon?
which of the following group represents the females in the group?
Four of the five among the following are similar in such a way to form a group, which one of following doesn’t belong to the group?
...Six boxes R, S, T, U, V and W are kept one above another. The bottommost box is numbered as 1 and the topmost box is numbered as 6. R is three boxes bel...
How many boxes are kept above the box with Orchid?
What is the position of L with respect to R?
Who among the following is the second youngest?
Six items, T, U, V, W, X and Y are placed one above another. Two items are placed above X. V is placed just above Y. Three items are placed between Y an...
Relevant for Exams:
