Question
A boat, whose speed in still water is 25% more than the
speed of the current, covers 810 km downstream in _____ hours. The speed of the boat in still water is ______ km. The values given in which of the following options will fill the blanks in the same order in which is it given to make the statement true: I. 20, 24 II. 10, 45 III. 30, 15Solution
Let, the speed of the current be x km/hr Therefore, speed of the boat in still water = 1.25x km/hr Downstream speed of the boat = x + 1.25x = 2.25x km/hr For I: 2.25x = 810/20 => x = 40.5 => x = 18 Therefore, speed of boat in still water = 1.25x = 22.5 km/hr Therefore, I is false. For II: 2.25x = 810/10 => 2.25x = 81 => x = 36 Therefore, speed of boat in still water = 1.25x = 45 km/hr Therefore, II is true. For III: 2.25x = 810/30 => 2.25x = 27 => x = 12 Therefore, speed of the boat in still water = 1.25x = 15 km/hr Therefore, III is true.
Find the wrong number in the given number series.
64, 95, 150, 229, 334, 459Â
256Â Â Â 768Â Â Â 96Â Â Â 288Â Â Â 35Â Â Â 108
Find the wrong number in the given number series.
63, 66, 57, 75, 51, 81
164, 304, 433, 551, 658, 752
- Find the wrong number in the given number series.
6, 12, 24, 50, 96, 192 - Find the wrong number in the given number series.
154, 137, 114, 84, 46, 11 13, 16, 24, 39, 64, 98
Find the wrong number in the given number series.
2160, 360, 72, 18, 6, 2
Find the wrong number in the given number series.
41, 51, 63, 80, 101, 126
2Â Â Â Â Â 27Â Â Â Â Â Â 43Â Â Â Â Â 50 Â Â Â Â Â Â 56 Â Â Â Â Â Â Â 57
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