24. A man makes a business trip from his house to Batangas in 2 hours. One hour later, he returns home in traffic in traffic at a rate of 20 kph less that his going rate. If he is gone a total of 6 hours, how fast did he travel going back home? a. 30 kph b. 40 kph c. 60 kph d. 80 kph

24. A man makes a business trip from his house to Batangas in 2 hours. One hour later, he returns home in traffic in traffic at a rate of 20 kph less that his going rate. If he is gone a total of 6 hours, how fast did he travel going back home? a. 30 kph b. 40 kph c. 60 kph d. 80 kph

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter9: Fluids And Solids

Section: Chapter Questions

Problem 24P: The average human has a density of 945 kg/m3 after in haling and 1 020 kg/m3 after exhaling. (a)...

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Answer #24&25 only

23.
24.
25.
The gasoline tank of a car contains 50 liters of gasoline and alcohol, with alcohol comprising 25%.
How much of the mixture (in liters) must be drawn off and replaced by alcohol so that the tank contains
a mixture of which 50% is alcohol?
a. 12.27
b. 13.56
c. 14.76
d. 16.67
A man makes a business trip from his house to Batangas in 2 hours. One hour later, he returns home
in traffic in traffic at a rate of 20 kph less that his going rate. If he is gone a total of 6 hours, how fast
did he travel going back home?
a. 30 kph
b. 40 kph
c. 60 kph
d. 80 kph
A man can row his boat at a constant rate of 5 mph in still water. He rows upstream for 15 minutes
and then rows downstream, returning to his starting point in another 12 minutes. What is the rate of
the current in mph?
a. 0.65
b. 0.43
c. 0.34
d. 0.56

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