The passengers in a moving bus observe that the trees, buildings as well as the people on the roadside appear to be moving backwards. Similarly, a person standing on the roadside observes that the bus (along with its passengers) is moving in forward direction. But, at the same time, each passenger in a moving bus or train observes, his fellow passengers sitting and not moving. Thus, we can tell that motion is relative.

The table given below shows distance (n cm) travelled by bodies A, B and C. Read this data carefully and answer the following questions. Distance (in cm) covered by different bodies.
Time in (s) | Body (A) | Body (B) | Body (C) |
1stSecond | 20 | 20 | 20 |
2ndSecond | 20 | 36 | 60 |
3rdSecond | 20 | 24 | 100 |
4thSecond | 20 | 30 | 140 |
5thSecond | 20 | 48 | 180 |