Asked by johnny

An Olympic athlete run for x minutes at y metres a minute and walks for w minutes at z metres a minutes as part of his training schedule. If the length of the course is d metres, write a formula for d.
Answered by Steve
distance = speed * time, so

d = xy+wz

You can see this by watching the units.

xmin * ymeters/min = xy meters
Answered by johnny
Perfect, Thankyou so much
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