Question

NASA is building a satellite that is roughly the shape of a sphere. If the satellite weighs 14.25 pounds per cubic foot before launch, and has a diameter of 4.7 feet, what is the total weight in pounds of the satellite on Earth? Use π = 3.14.

Answer 1

774 lb

Explanation:

weight = volume * density

radius = diameter/2

volume = (4/3)πr^3

volume = (4/3)(3.14)(4.7/2 ft)^3

weight = (4/3)(3.14)(4.7/2 ft)^3 * 14.25 lb/ft^3

weight = 774 lb