Question
Pipes A and B can fill an empty tank in 6 and 8 hours
respectively, while pipe C can empty the full tank in 10 hours. If all three pipes are opened together, then the tank will get filled in:Solution
Pipe A (+)        pipe B (+)         pipe C (-) 6                     8                     10                        120 (LCM of 6,8,10)-total 20                   15                   12.      (efficiency) Tank fill in 1 hour =20+15-12=23unit. In 5 hours =23×5=115 unit Remaining empty tank. =120-115=5. 5 units fill in the tank in 5/23 hours. Total hours =5+5/23=5(5/23).
- Find the wrong number in the given number series.
25, 36, 29, 40, 33, 50 154Â Â Â Â 165Â Â Â Â 143Â Â Â Â 175Â Â Â Â Â 132Â Â Â Â Â 187
...5000, 4500, 3600, 2480, 1512, 756Â Â Â
Find the wrong number in the given number series,
125, 150, 250, 475, 875, 1500
- Find the wrong number in the given number series.
5, 8, 12, 19, 27, 39 768Â Â Â 2304Â Â Â 288Â Â Â 864Â Â Â 106Â Â Â 324
Find the wrong number in the given number series.
5, 6, 14, 45, 188, 925
120, 240, 80, 320, 60, 384
21 32 54 86 131 186
... 7    12     33    126    635  Â
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