1. Sphere 1 has surface area A1 and volume V1 and sphere 2 has surface area A2 and volume V2. If the radius of sphere 2 is 3.86 times the radius of sphere 1, what is the ratio of the areas A2/A1?
2. What is the ratio of the volumes
V2/V1
We know that area of a sphere is given as
A = 4r2
given
r2 = 3.86 * r1
so,
A2 / A1 = r22 / r12
4 will get cancelled
A2 / A1 = 3.862 * r12 / r12
A2 / A1 = 14.89
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volume of sphere is given as
V = 4/3r3
4/3 will get cancelled, we get
V2 / V1 = r23 / r13
V2/ V1 = 3.863
V2 / V1 = 57.51
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