How do you do Rate problems 2?

Starting at home, Jessica traveled uphill to the toy store for 12 12 12 minutes at just 10 10 10 mph. She then traveled back home along the same path downhill at a speed of 30 30 30 mph. What is her average speed for the entire trip from home to the toy store and back?

Question

Tommy Brandt

Mathematics

22 August, 15:02

How do you do Rate problems 2?

Starting at home, Jessica traveled uphill to the toy store for 12 12 12 minutes at just 10 10 10 mph. She then traveled back home along the same path downhill at a speed of 30 30 30 mph. What is her average speed for the entire trip from home to the toy store and back?

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Answers (2)

Know the Answer?

Julien Shields · Answer 1

D = rt

Uphill

d = 10 (12/60) d = 2 miles (12/60) represents part of an hour

Downhill

2 = 30t

2/30 = t 1/15 = t 1/15 of an hour = 4 minutes

Average speed = total miles covered/total time

total distance = 4 miles

total time = 4 minutes + 12 minutes = 16 minutes/60 = 4/15 of an hour

4 / (4/15) = 15 mph

Bennett · Answer 2

It wants an average. So 30 MPH + 12 MPH : 2 which represents the 2 directions. Equal 21 MPH

How do you do Rate problems 2?Starting at home, Jessica traveled uphill to the toy store for 12 12 12 minutes at just 10 10 10 mph. She then traveled back home along the same path downhill at a speed of 30 30 30 mph. What is her average speed for the entire trip from home to the toy store and back?