The surface area of a spherical balloon is 175 cm2. If the length of the radius was six times as large, what would the surface area be?

A)
1050 cm2

B)
6300 cm2

C)
8400 cm2

D)
11200 cm2

Question

The surface area of a spherical balloon is 175 cm2. If the length of the radius was six times as large, what would the surface area be?
	

A)
	1050 cm2		
	

B)
	6300 cm2		
	

C)
	8400 cm2		
	

D)
	11200 cm2

saifoo.khan · Answer

Do you know the formula for finding the surface area?

hockey1 · Answer

SA = 4 π r2?

saifoo.khan · Answer

Yes. Now insert the values!

saifoo.khan · Answer

Solve for r:

hockey1 · Answer

im still confused. im not sure how to do it

saifoo.khan · Answer

Since you are given the value for the total surface area. 
Replace the value for surface area for SA