Question
A and B are travelling towards each other with a speed
of 30 km/hr and 40 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 = 30:40 = 3:4 Let the distance covered by A and B be 3x km and 4x km According to the question, 4x – 3x = 20 Or, x = 20 Therefore, distance between them before starting = 3x + 4x = 7x = 140 km
5, 14, 41, 122, 365, 1094, ?
1 0.5 3 7.5 21.5 74.25
3, 4, 10, 33, 136, ?, 4116
1 9 64 255 755 1835
...27Â Â Â Â Â 32Â Â Â Â Â 42Â Â Â Â Â Â 57Â Â Â Â Â Â 77Â Â Â Â Â ?
...86 36 ? 7 7.5 0.75
Select the number from among the given options that can replace the question mark (?) in the following series.
64, 60, 52, 40, ?, 4
5Â Â Â Â Â Â Â Â Â 18Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 44Â Â Â Â Â Â Â Â Â Â Â 83Â Â Â Â Â Â Â Â Â 135Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 200Â Â Â Â ...
5468, 2734, 1367, 683.5, 341.75, ?
Three series are given below. You have to find the values of P, Q and R, then establish a relationship among them.
I:Â Â Â 210, P , 233, 64,...
Relevant for Exams:
