r2=1/2 r1t2=1/4 t1= V1 : V2= πr1^2t1 : πr2^2t2= r1^2t1 : (1/2 r1)^2 (1/4t1)= r1^2t1 : (1/4)r1^2 (1/4t1)= r1^2t1 : (1/16) r1^2t1= 16 : 1
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r2=1/2 r1
t2=1/4 t1
= V1 : V2
= πr1^2t1 : πr2^2t2
= r1^2t1 : (1/2 r1)^2 (1/4t1)
= r1^2t1 : (1/4)r1^2 (1/4t1)
= r1^2t1 : (1/16) r1^2t1
= 16 : 1