Question

10.Radius of the sphere is three times that of the other sphere. Find the ratio of surface
areas of the sphere. .
ಒಂದು ಗೋಳದ ತ್ರಿಜ್ಯವು ಮೂರರಷಾದರೆ ಗೋಳಗಳ ಮೇಲೆ ವಿಸೀರ್ಣಗಳ ಅನುಪಾತವನ್ನು​

Answer 1

Step-by-step explanation:

volume = 4/3r³

then,

4/3r³ = 4/3(2r)³

r³ = 8r³

hence there volume ratio is 1:8

T.S.A of sphere = 4r²

4r² = 4(2r)²

r² = 4r²

then ratio of their surface =1:4