Question

Kyle lan part of a 42 km marathon at an

average speed of 12 km/hr and walked the
rest at an average speed of 5 km Ihr. He
wasn't feeling great, so he spent Ihr
more time walking than running. How
long did it take him to finish the
marathon

Answer 1

• 5 6/17 hours or approximately 5 hours and 21 minutes

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Let the time Kyle ran be x, then he walked for (x + 1) hours.

He ran 12x km and walked 5(x + 1) km thus in total 42 km.

Set up and equation and solve for x:

• 12x + 5(x + 1) = 42
• 12x + 5x + 5 = 42
• 17x + 5 = 42
• 17x = 37
• x = 37/17

Total time was:

• 37/17 + 37/17 + 1 =
• 74/17 + 1 =
• 4 6/17 + 1 =
• 5 6/17 hrs