Module ·
Chapter 5: Time, Speed & Distance
Arithmetic
4 topics
What this chapter covers
The 4 topics below make up Time, Speed & Distance in the SSC CGL exam. Click any topic to open its notes, examples and practice test.
Study material & tests
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Formula Reference Sheet
This chapter
Core relations
| Basic | distance = speed x time |
|---|---|
| Unit conversion | km/h x 5/18 = m/s ; m/s x 18/5 = km/h |
| Average speed (equal distance) | 2ab/(a+b) |
| Inverse rule | fixed distance: speed up x% -> time down by ratio |
Relative speed, trains, boats
| Same direction | relative speed = a - b |
|---|---|
| Opposite direction | relative speed = a + b |
| Train crossing object of length L | time = (train + L) / speed |
| Downstream / Upstream | b + s and b - s (boat b, stream s) |
SSC reference
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