a.3/4 P b. 1/36 P c. 4/36 P d. 4/3 P bantuin ya.. beserta cara dan penjelasannya

P1 : P2 = F1/A1 : F2/A2
P1 : P2 = F1/(πr₁²) : F2/(πr₂²)
P1 : P2 = F1/r₁² : F2/r₂²

m2 = 1/4m
r = 3r

P2 = (1/4m x g) / (3r)²
P2 = (1/4m x g) / (9r²)
P2 = 1/4F / 9 r²
P2 = 1/36 F/r²  = 1/36 P

CMIIW