Question

Guys please answer this question properly
experts please answer this i need an expert and well formatted answer please i beg you

Answer 1

Answer:

radii are 12 and 9

Step-by-step explanation:

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let radius of Volume A s R and volume B is r

A :B = 64 :27

after putting volume of sphere = 4/3π r cube

R cube : r cube = 64 :27

R /r = cube root of ( 64 : 27)

R /r = 4/3

R = 4/3 r

now R + r = 21 given

so 4/3 r + r = 21

4 r + 3r = 21 x 3

7 r = 63

r = 63 /7 = 9

R = 21 -9 = 12

Answer 2

Answer:

9 and 12

Step-by-step explanation:

sphere formula is 4/3 πr³. The only thing that changes the size of the spheres is the radii, so you can ignore everything but the r³. As r³:r³ = 27:64, you take the cubic root of 27 and 64 and get 3:4. As the radii add up to 21, you scale it up you get to 9:12, because 9+12=21