Question

Helen needs a replacement ball bearing for this part. The surface area of each spherical ball bearing is approximately 452.16 square millimeters. What is the radius of the bearing that Helen needs to buy? Round your answer to a whole number.

Answer 1

Helen needs a replacement ball bearing whose radius is 5.99mm

A sphere is a perfectly round geometrical 3-dimensional object. It can be characterized as the set of all points located distance r (radius) away from a given point (center). It is perfectly symmetrical, and has no edges or vertices.

The formula of surface area of the sphere is $4\pi r^{2}$ where r represents radius

Given:  Surface area of ball  = 452.16$mm^{2}$

Using formula we get,

$4\pi r^{2}$ = 452.16$mm^{2}$

r^2 = 452.16/4$\pi$

r = 5.99 mm

Thus Helen needs a replacement ball bearing whose radius is 5.99mm

Learn more about Surface area here :

brainly.com/question/2835293

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