+0  
 
0
71
2
avatar

Determine the surface area (in square inches) of an NBA basketball.

 Mar 19, 2020
 #1
avatar+111360 
+2

Mmmmm...after an internet search.....I found that an NBA ball has a circumference  of 29.5  in

 

So....to  find  the radius we  have

 

29.5  / [2pi]   ≈  4.695  in  =  radius

 

So.....the surface area  =

 

4 * pi * radius^2  =

 

4 * pi  * ( 4.695)^2  ≈  277  in^2

 

 

cool cool cool

 Mar 19, 2020
 #2
avatar+1955 
+2

CPhill, your calculations seem accurate, but why is the answer 277in^2?

The circumference is 29.5 inches (You can memorize this)

Therefore, the diameter would be around 9.4 inches, which makes the radius about 4.7 inches.

 

The surface area would be around 277.59 in^2, or 278 in^2. I think you had a rounding mistake, CPhill!

 

Hope this helped!

 Mar 19, 2020
edited by CalTheGreat  Mar 19, 2020
edited by CalTheGreat  Mar 19, 2020

11 Online Users

avatar
avatar