Difference between revisions of "1999 AMC 8 Problems/Problem 7"
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| − | == | + | ==Problem== |
| − | The third exit on a highway is located at milepost 40 and the tenth exit is at | + | The third exit on a highway is located at milepost 40 and the tenth exit is at milepost 160. There is a service center on the highway located three-fourths of the way from the third exit to the tenth exit. At what milepost would you expect to find this service center? |
| − | milepost 160. There is a service center on the highway located three-fourths | ||
| − | of the way from the third exit to the tenth exit. At what milepost would you | ||
| − | expect to find this service center? | ||
| − | |||
| − | + | <math>\text{(A)}\ 90 \qquad \text{(B)}\ 100 \qquad \text{(C)}\ 110 \qquad \text{(D)}\ 120 \qquad \text{(E)}\ 130</math> | |
| − | + | ==Solution== | |
| − | center is at milepost 40+ (3/4) 120= 40+90=130. | + | |
| + | There are <math>160-40=120</math> miles between the third and tenth exits, so the service center is at milepost <math>40+(3/4)(120) = 40+90=\boxed{\text{(E)}\ 130}</math>. | ||
==See Also== | ==See Also== | ||
{{AMC8 box|year=1999|num-b=6|num-a=8}} | {{AMC8 box|year=1999|num-b=6|num-a=8}} | ||
Revision as of 13:31, 23 December 2012
Problem
The third exit on a highway is located at milepost 40 and the tenth exit is at milepost 160. There is a service center on the highway located three-fourths of the way from the third exit to the tenth exit. At what milepost would you expect to find this service center?
Solution
There are 
miles between the third and tenth exits, so the service center is at milepost 
.
See Also
| 1999 AMC 8 (Problems • Answer Key • Resources) | ||
| Preceded by Problem 6 |
Followed by Problem 8 | |
| 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 | ||
