tolong di jawab ya,pake cara

R1 = 8×10^6 m
T1 = 1×10^6 s
R2 = 2×10^7 m
T2?

penyelesaian:
T2^2 / T1^2 = R2^3 / R1^3

T2^2 / (10^6)^2 = (2×10^7)^2 / (8×10^6)^2

T2^2 / 10^12 = 4×10^14 / 64×10^12

T2^2 = 10^12 × 4×10^14 / 64×10^12

T2^2 = 10^14 / 16

T2^2 = 625 × 10^10

T2 = akar 625 × 10^10

T2 = 2.500.000 s

T2 = 25 × 10^5 s