21-07-2017
Mathematics

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Palmers average running speed is 3 kilometers per hour faster than his walking speed. If Palmer can run around a 40-kilometer course in 4 hours, how many hours would it take for Palmer to walk the same course?

Respuesta :

21-07-2017

r=40/4=10km/hr

w=r-3

w=10-3

w=7km/hr

t=40/7 hr

t=5 5/7 hr

t≈5.714 hr (to nearest thousandth of an hour...≈5:42:51)

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