Question

Please solve the 3rd question.
Thanks in advance! :)

Answer 1

Answer:

radius of the first circle is 10

radius of hte second circle is 15

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Answer 2

Answer:

r=10 cm

Step-by-step explanation:

let radius of first sphere, S1 be r

then radius of other sphere, S2 will be r+5

volume of S1/Volume of S2=8/27

4/3 $\pi$r^3/4/3 $\pi$(r+5)^3=8/27

(r/r+5)^3=8/27

r/r+5=2/3

3r=2r+10

r=10cm