If two cylinders of same lateral surface have their radii in the ratio 4 : 9, then the ratio of their heights is :
A. 2:3
B. 3 : 2
C. 4 : 9
D. 9 : 4
Answer:D
If two cylinders of same lateral surface have their radii in the ratio 4 : 9, then the ratio of their heights is :
A. 2:3 B. 3 : 2 C. 4 : 9 D. 9 : 4