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Let the speed of the boat in still water and the speed of the current be ‘x’ km/hr and ‘y’ km/hr, respectively Upstream speed of the boat = (x – y) = 240/12 = 20 km/hr Or, 30 – y = 20 Or, y = 30 – 20 = 10 km/hr Therefore, downstream speed of the boat = 30 + 10 = 40 km/hr Required time taken = 120/40 = 3 hours
1 2 6 ...
105 107 111 114 ? 127
15 12 ? 9 21 6
...Complete the series choosing the missing number.
8, 13, 20, ____, 40.
11, 9, 15, 41 ,157, 789
625, 5, 125, 25, 25, ? , 5
43 36 50 29 ? 22
...D irection: Which of the following will replace ‘?’ in the following series
460, 462, ‘?’, 467.5, 470.97
...95 186 376 748 1500 ?
...53 ? 55 49 57 47
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