Question
A and B are travelling towards each other with a speed
of 20 km/hr and 30 km/hr. They started at same time and A covered 40 km less distance than B before meeting B. Find the distance between them before starting.Solution
Here time taken by both A and B is same, so the ratio of the distance covered by them will be equal to the ratio of their speeds. Therefore, ratio of the distance covered by A and B = 20:30 = 2:3 Let the distance covered by A and B be 2x km and 3x km respectively. According to question, => 3x – 2x = 40 => x = 40 Therefore, distance between them before starting = 3x + 2x = 5x = 200 km
56. 23Â Â Â Â Â 45Â Â Â Â Â 89Â Â Â Â Â 177Â Â Â Â Â 363Â Â Â Â Â 705
...625, 5, 125, 25, 25, ? , 5
There are three series given below which are following with the same pattern.
Series I: 9, 10, 32, 163, 1145
Series II: 4, B, C, D, E
...5 14 56 220 1125 6786
...2,0, 9, 20, ‘?’, 714
7 29 ? 129 211 349
25Â Â Â Â Â Â Â Â Â Â 34Â Â Â Â Â Â Â Â Â Â 61Â Â Â Â Â Â Â Â Â Â 106Â Â Â Â Â Â Â Â 169Â Â Â Â Â Â Â Â ?
...9 10 6 15 -1 ?
...22   39    58    81   ?      141
The question below is based on the given series I. The series I satisfy a certain pattern, follow the same pattern in series II and answer the questions...
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