Question

1. If a cyclist in the Tour de France traveled southwest for 12,250 meters in one hour, what would the velocity of the cyclist be in meters per second?

2.Daniel rides his bicycle on a bike path that is 75 kilometers long to get to his house that is due east of the bike path. If it takes Daniel 15 hours then what was his average speed?

3. Lia jogs on a path that is 25 kilometers long to get to a park that is south of the park of the jogging path. If it takes Lia 2.5 hours then what was her average speed?

4. A plane flies from New York to Los Angeles at a constant speed of 800 km/hr. If the distance from New York to Los Angeles is 4000 km how long will it take the plane to fly that distance?

Answer 1

Answer of question (1):

The given speed = 12250 m/hr (meters per hour)

It is required to find speed in m/s (meter per second)

∵ one hour = 60 minutes = 3600 seconds

∴ speed = 12250 ÷ 3600 ≈ 3.4 m/sec (meter per second)

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Answer of question (2):

Distance = 75 km

Time = 15 hours

Average speed = Distance ÷ Time = 75 ÷ 15 = 5 km/hr (kilometer per hour)

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Answer of question (3):

Distance = 25 km

Time = 2.5 hours

Average speed = Distance ÷ Time = 25 ÷ 2.5 = 10 km/hr (kilometer per hour)

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Answer of question (4):

Speed = 800 km/hr

Distance = 4000 km

Time = Distance ÷ Speed = 4000 ÷ 800 = 5 hr.