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 (3/5)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 = {(3/5) × 18)}/3 = 3.6 hours
2600, 3000, 1759, 1275, 746, 170
Find the Wrong number in the given number series.
29, 76, 123, 166, 209, 256156, 182, 212, 240, 272, 306
32, 41, 66, 115, 236, 415
25Â Â Â 26Â Â Â Â 28Â Â Â Â 32Â Â Â Â 42Â Â Â Â 56
150, 900, 300, 1800, 600, 3700, 1200
- Find the wrong number in the given number series.
10, 14, 23, 48, 99, 218 140Â Â Â 150Â Â Â 175Â Â Â Â 185Â Â Â Â 210Â Â Â Â Â 225Â Â Â Â Â
...Find the wrong number in the given number series.
10, 17, 26, 39, 59, 85
In each of the following giving number series, a wrong number is given. Find out the wrong number?
82, 81, 86, 110, 168, 287