SOLUTION: Julia takes 40 seconds to walk as far as 50 metres. Write a formula to help Julia calculate the duration of the trip, x in minutes from her home to the school that is y kilometres

Algebra ->  Equations -> SOLUTION: Julia takes 40 seconds to walk as far as 50 metres. Write a formula to help Julia calculate the duration of the trip, x in minutes from her home to the school that is y kilometres       Log On


   

Question 1110116: Julia takes 40 seconds to walk as far as 50 metres. Write a formula to help Julia calculate the duration of the trip, x in minutes from her home to the school that is y kilometres away.
Please help me, thank you
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Convert seconds to minutes
[ seconds ] x [ minutes / second ] = [ minutes ]
+40%2A%28+1%2F60+%29+=+2%2F3+ min
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Her rate in meters/min is:
+50%2F%282%2F3%29+=+75+ m/min
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[ distance ] = [ rate ] x [ time ]
+y+=+75x+
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check the answer:
Suppose she walks for +120+ secs that is +2+ min
She will walk +3%2A50+=+150+ m in that time
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+y+=+75x+
+150+=+75%2A2+
+150+=+150+
OK