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Work done by the filling pipe in 1 minute = 1/18 Work done by the emptying pipe in 1 minute = -1/27 Net work done in 1 minute = (1/18 - 1/27) = 1/54 Time taken to fill the tank = 1 ÷ 1/54 = 54 minutes. Correct answer: a) 54 minutes
72 85 103 126 154 ?
...9 4.5 4.5 9 36 ?
Direction: Which of the following will replace ‘?’ in the given question?
5, 18, ‘?’, 126, 296, 586, 1044
7 15 44 89 ? 533
...130 155 146 195 186 ?
...1335 737 355 141 47 ?
...D irection: Which of the following will replace ‘?’ in the following series
460, 462, ‘?’, 467.5, 470.97
...16 18 14 20 12 ?
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