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62 points! a bus traveled on a level road for 3 hours at an average speed of 20 miles per hour faster than it traveled on a winding road. The time spent on the winding road was 6 hours. Find the average speed on the levelroad if the entire trip was 482 miles.

Respuesta :

mhanifa

Answer:

  • ≈ 66.89 mph

Step-by-step explanation:

Let the average speed on the level road was x.

Then the average speed on the winding road was x - 20.

The total distance is:

  • 3x+ 6(x - 20) = 482
  • 3x +  6x - 120 = 482
  • 9x = 482 + 120
  • 9x = 602
  • x = 602/9
  • x ≈ 66.89 mph

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