What is the two-second gap, in metres, behind the vehicle ahead when driving at 72 km/h?
Answer and explanation
Correct answer: D. 40 m
- Step 1: Speed in m/s = 72 ÷ 3.6 = 20 m/s. Step 2. Two seconds cover 40 m. Answer: 40 m. Why not the others: 20 m results from having allowed only one second. 60 m results from having allowed three seconds. 36 m results from having taken half of the speed in km/h.
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