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3. A car travels 50 mph on a trip from Chicago, IL to Minneapolis, MN and 65 mph on the return trip. What is the average speed of the car for the entire round trip?

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Average speed = speed 1 + speed 2/ 2

50 mph + 65 mph/2

115/ 2

57.5 mph

50 mph + 65 mph/2

115/ 2

57.5 mph

Av Speed= (1st speed + 2nd speed)÷2

∴ Av speed=(50+65)÷2

=115÷2

=57·5

∴ Av speed=(50+65)÷2

=115÷2

=57·5