Driving theory questions
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You are driving at 90 km/h. How many metres does the car travel in 4 seconds?
| Colour codes for the figures (easier to keep track of them) | |
| Current speed | 90 km/h |
| Time | 4 seconds |
| Metres per second (to be calculated) | X m/s |
Method 1
Convert km/h to m/s:
- 90 / 3.6 = 25 m/s
How many metres do you travel?
- 25 * 4 = 100 metres
3.6 is a fixed figure for converting km/h to m/s. It is difficult to divide by 3.6 in your head. A tip is to first divide by 3 and then by 4. You then take a number that is between the answers you get (the margins between the answer options are so large that closer accuracy is not required).
Method 2
Strike the zero in km/h:
- 90 = 9
Convert km/h to m/s:
- 9 * 3 = 27 m/s
How many metres do you travel?
- 27 * 4 = 108 metres (closest to the answer 100)
Multiplied by 3 is a fixed figure for making approximate conversions from km/h to m/s.
Useful links:
- Stopping distance, reaction distance and breaking distance (Körkortonline.se)
Körkortonline.se offers driving licence theory tests. This is an example of an explanation of a test question. English theory test (free demo), Swedish theory test (free demo) and Arabic theory test (free demo).
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