10. Sally reasoned that if she drove 30 km/hr in one direction over a 180 km distance, and then returned traveling at 60 km/hr over the same distance, that her average speed must be half way between 30 and 60, which is 45 km/hr. Is she right? Why or why not?
10. Sally reasoned that if she drove 30 km/hr in one direction over a 180 km distance, and then returned traveling at 60 km/hr over the same distance, that her average speed must be half way between 30 and 60, which is 45 km/hr. Is she right? Why or why not?
Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter7: Applying Fractions
Section7.7: Mixture Problems
Problem 6P
Question
![10. Sally reasoned that if she drove 30 km/hr in one direction over a 180 km distance, and
then returned traveling at 60 km/hr over the same distance, that her average speed
must be half way between 30 and 60, which is 45 km/hr. Is she right? Why or why not?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F7440da40-7bdb-4d11-be8e-b7bdca03efe4%2Fd3b74260-ff60-40da-b615-f19b0387c29c%2Fo4hy4hj_processed.jpeg&w=3840&q=75)
Transcribed Image Text:10. Sally reasoned that if she drove 30 km/hr in one direction over a 180 km distance, and
then returned traveling at 60 km/hr over the same distance, that her average speed
must be half way between 30 and 60, which is 45 km/hr. Is she right? Why or why not?
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