Question
Pipe A and B can fill the pool in 36 minutes and 48
minutes, respectively. Pipe C can empty half filled pool in 36 minutes. If all the pipes are opened together, then find the time taken to fill the empty pool completelySolution
Time taken by pipe C to empty the full pool = 36 × 2 = 72 minutes Let the capacity of pool = 144 units Number of units of water filled by pipe A alone in one minute = 144/36 = 4 units Number of units of water filled by pipe B alone in one minute = 144/48 = 3 units Number of units of water emptied by pipe C alone in one minute = 144/72 = 2 units Required time taken = 144/(4 + 3 – 2) = 28.8 minutes
13 19 32 52 ? 113
1290, 1225, 1175, ?, 1112, 1095, 1085
? , 864, 432, 144, 36, 7.2
106, 124, 88, 142, ?, 160
What value should come in the place of (?) in the following number series?
5670, 1620, 540, 216, 108, ?
7, 9, 21, ?, 107, 197
71, 79, 88, 152, ?, 393
14, 20, 29, 44, 65, ?
What will come in place of the question mark (?) in the following series?
2.5, 6.5, 18.5, 54.5, 162.5, 486.5, ?
22, 37, 63, 98, 148, ?
Relevant for Exams:
