Question

The volume of two spheres is 27 is to 64.find the radii.
If sum is 28.​

Answer 1

V1:v2=27:64

V1/v2=27/64

4/3πR1^3/4/3πR2^3=27/64

(R1/R2)^3=27/64

R1/R2=3/4

4R1=3R2

R1=3R2/4

R1+R2=28

3R2/4 +R2=28

3R2+4R2/4=28

7R2=28×4

R2=28×4/7

R2=4×4

R2=16

R1+R2=28

R1=28-R2

R1=28-16

R1=12

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