Using the typical figures, how much longer is the overall stopping distance at 70 mph than at 30 mph?
Answer and explanation
Correct answer: D. 73 metres
- Step 1: Overall at 70 mph is 21 + 75 = 96 m, and at 30 mph it is 9 + 14 = 23 m. Step 2. Subtract: 96 - 23 = 73 m. Answer: 73 metres. Why not the others: 96 m is the 70 mph figure itself. 62 and 84 come from wrongly adding or subtracting the parts.
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