2018 AMC 8 Problems/Problem 6: Difference between revisions
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==Solution== | ==Solution== | ||
Since Anh spends half an hour to drive 10 miles on the coastal road, | Since Anh spends half an hour to drive 10 miles on the coastal road, his speed is <math>r=\frac dt=\frac{10}{0.5}=20</math>mph. His speed on the highway then is <math>60</math>mph. He drives <math>50</math> miles, so he also drives <math>50</math> minutes. The total amount of minutes spent on his trip is <math>30+50\implies \boxed{\textbf{(C) }80}</math> | ||
==See Also== | ==See Also== | ||
Revision as of 14:32, 27 February 2019
Problem 6
On a trip to the beach, Anh traveled 50 miles on the highway and 10 miles on a coastal access road. He drove three times as fast on the highway as on the coastal road. If Anh spent 30 minutes driving on the coastal road, how many minutes did his entire trip take?
Solution
Since Anh spends half an hour to drive 10 miles on the coastal road, his speed is 
mph. His speed on the highway then is 
mph. He drives 
miles, so he also drives minutes. The total amount of minutes spent on his trip is 
See Also
| 2018 AMC 8 (Problems • Answer Key • Resources) | ||
| Preceded by Problem 5 |
Followed by Problem 7 | |
| 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 | ||
| All AJHSME/AMC 8 Problems and Solutions | ||
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