Perimeter + sphere - practice problems

Number of problems found: 7

What is bigger?
Which ball has a larger volume: a football with a circumference of 66 cm or a volleyball with a diameter of 20 cm?
Rotation of the Earth
Calculate the circumferential speed of the Earth's surface at a latitude of 61°. Consider a globe with a radius of 6378 km.
Average speed
What is the average speed you have to move the way around the world in 80 days? (Path along the equator, round to km/h).
The Earth
The Earth's surface is 510,000,000 km². Calculates the radius, equator length, and volume of the Earth, assuming the Earth has the shape of a sphere.
The volleyball ball
The volleyball ball can have a circumference after inflation of at least 650 max 750 mm. What volume of air can this ball hold, if its circumference is the average of the minimum and maximum inflation of the ball.
Earth parallel
Earth's radius is 6370 km long. Calculate the length parallel of latitude 50°.
Earth's circumference
Calculate the Earth's circumference of the parallel 48 degrees and 10 minutes.

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Perimeter - practice problems. Sphere practice problems.