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Alastair drives 18.2 miles in 14 minutes. He passes a sign which gives the speed limit as 50 mph. By how much, in mph, did Alastair's average speed exceed the speed limit?
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Alastair drives 18.2 miles in 14 minutes.

He passes a sign which gives the speed limit as 50 mph.
By how much, in mph, did Alastair's average speed exceed the speed limit?

User Prudence
by
5.0k points

2 Answers

3 votes

Answer:

28mph

Explanation:

User Grigson
by
5.8k points
2 votes

Answer:

28 mph

Explanation:

Distance

  • 18.2 miles

Time

  • 14 min = 14/60 hr

Average speed

  • d/t = 18.2 ÷ 14/60 = 182/10 × 60/14 = 78 mph

The difference with allowed speed

  • 78 - 50 = 28 mph
User Tylercomp
by
4.8k points
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