1.

The ratio between the voulmes of two spheres is 8 :27. Then the ratio between the surface areas is _____​

Answer»

VOLUME of SPHERE is 34πr3

V2V1=34πr2334πr13=r23r13=278

⇒r2r1=32

⇒S2S1=4πr224πr12=r22r12



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