No.15 tolong dijawab pake cari ya...

Dik= d=10 jadi r =5
t=12
Jawab:

L = π.r(r+s) mencari s^2= r^2+t^3
=π.5(5+13) = 5^2+12^2
=π.5.18 =25+144
=90π = √169
s=13