Question
Pipe ‘A’ can fill a tank in 20 hours while pipe
‘B’ takes 30 hours to empty it. Pipe ‘A’ is opened alone when the tank was empty and after 11 hours pipe ‘B’ is also opened. In how much time will the tank get filled completely?Solution
Let the total capacity of the tank be 60 units Efficiency of pipe ‘A’ = 60/20 = 3 units/hour Efficiency of pipe ‘B’ = 60/30 = 2 units/hour Tank filled in 11 hours = 11 × 3 = 33 units Therefore, required time taken to fill the remaining tank = (60 – 33)/(3 – 2) = 27 hours Therefore, total time taken = 11 + 27 = 38 hours
Find the missing number, in the given number series.
6, 12, 36, ?, 720, 4320
81, 41, 42, 64.5, ?, 330
Find the missing number in the given number series.
1, 2, 3, 6, 11, 20, ?If series II follows the same sequence pattern as series I shown below, determine the value of 'p'.
Series I: 40, 25, 30, 50, 105, 267.5
<...37, 49, 63, ?, 97, 117
What will come in place of the question mark (?) in the following series?
4, 8, 24, ?, 480, 2880
13 19 32 52 ? 113
What will come in place of the question mark (?) in the following series?
21, 36, 66, 126, ?, 486
The question below is based on the given series I. The series I satisfy a certain pattern, follow the same pattern in series II and answer the questions...
50, 64, 80, 98, 118, ?
Relevant for Exams:
