If bill rides his bike 3 miles to Fred’s house and then walks with Fred the remaining 1 mile to school, it will take him 30 minutes. But if

Question

If bill rides his bike 3 miles to Fred’s house and then walks with Fred the remaining 1 mile to school, it will take him 30 minutes. But if he rides the entire distance, it will take him only 20 minutes. what is his walking and biking speed?

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    2021-09-06T03:07:23+00:00

    1mile per 10mins-walking(biking)together
    2 miles per 10mins-biking

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