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The diameter of a circle is 4 kilometers. What is the circle's circumference?
Circle's circumference: 4 times pi = 12.57 km rounded to 2 decimal places
The earth has a diameter of 12756.32 km. What is the circumference of the earth?
Multiply the diameter by pi to find the circumference
What is the radius of a circle with a diameter of 1.8 km?
the radius of a circle is half the diameter, so half of 1.8 is .9. The radius is .9km.
A satellite travels 800 km above the surface of the Earth. It takes 100 minutes to complete 1 orbit - the diameter of the earth is 12800 km. What is the speed in km per hour?
If the orbit is 800 greater than the Earth's diameter then we need to add 1,600 to the earth's diameter to get the diameter of the satellite's orbit, as it is 800 in both directions. 12,800 + 1,600 = 14,400 km diameter The circumference of a circle is π times the diameter. Let us use 3.1416 as an approximate value for π. That gives us a circumference of 45,239.04 km If it does that much in 100 minutes, then it will do 6/10 of that in 60 minutes. 45,239.04 x 6/10 = 27,143.424.... so we can round it off to a speed of 27,143.5 kph
If the diameter of the moon is 3475 km and an orbiting lunar station is circling 21 km above the lunar surface. what is the distance traveled by the lunar station in one orbit?
Assuming that the moon is spherical and the orbit is circular: Lunar diameter = 3,475 km Orbital diameter = 3,475 + 42 = 3,517 km Orbital circumference = (pi) times diameter = 3,517(pi) = 11,048.981 km (rounded)
