Question
A and B are travelling towards each other with a speed
of 40 km/hr and 50 km/hr. If they started at same time and A covered 20 km less distance than B before meeting him, then find the distance between them before starting.Solution
Since, the time taken by A and B is same, therefore 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 = 40:50 = 4:5 Let the distance covered by A and B be 4x km and 5x km According to the question, 5x – 4x = 20 Or, x = 20 Therefore, distance between them before starting = 5x + 4x = 9x = 180 km
What will come in place of the question mark (?) in the following series?
4, 2605, 5309, 8118, ?
117, 117, 121, 129, 141, ?
- What will come in place of the question mark (?) in the following series?
32, 45, ?, 137, 216, 317 10296/72 + 3040 = (? × 4) + 1395
38, 41, 50, ?, 158, 401Â
18, 35, 68, 117, ?, 263Â
What will come in place of the question mark (?) in the following series?
10, 135, ?, 226, 234, 235
- 741, 852, 1074, 1407, ?
9    14    38    129    ?   2705   16260
...What will come in place of the question mark (?) in the following number series?
21, 42, 67, 96, ?, 166
