Answer:
405
Step-by-step explanation:
r sequence= 5,15,45,135
d sequence:=10,30,90,270
r ratio is the Radio
d ratio is de Diameter
2*r=d
5*2=10, 15*2=30, 45*2=90, 135*2=270
to complete the sequence:
r+d= next r and continue
5+10=15
15+30=45
45+90=135
135+270=405
