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Let the speed of boat in still water =B and speed of stream =S Speed of boat in upstream =B-S=13×60/52 =15km/h S=3km/h B=18km/h Speed of boat in downstream =B+S=21km/h Take time cover 40km in downstream =40/21 =1(19/21)
7 7 ? 43 163 831
...15, 90, 95, ?, 383, 766
?, 6, 6, 9, 18, 45
What will come in place of the question mark (?) in the following series?
4, 11, 32, 95, 284, 851, ?
204, ?, 120, 83, 52, 23
14 6 4 4 ? 48
...11, ? 220, 660, 1320, 1320
36, 48, 24, 60, ?, 72
96, 144, ?, 324, 486, 729, 1093.5
24 36 72 108 216 ?
