Math CentralQuandaries & Queries


Question from Krystal, a student:

May rides her bike the same distance that leah walks. May rides her bike 10km/h faster than leah walks.
Its takes May 1 hour and Leah 3 hours to travel the sam distance, how fast does each travel?

Hi Krystal,

The key here is in the units. The rate at which each travels is in km/h which is distance/time so

rate = distance/time or distance = time × rate

Suppose Leah rides at L km/h then since she rides for 3 hours her distance is

distance = 3 × L.

What is May's rate? She sides for 1 hour so what is her distance?

The two distances are the same so this gives you an equation that you can solve for L>

I hope this helps,

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