kak tolong dong kak besok d kumpulin

1.a. garis pelukis (s)
s² = r² + t²
s² = 5² + 12²
s² = 25 + 144
s² = 169
s = √169
s = 13 cm

b. Luas selimut
L = π.r.s
L = 3,14 . 5 . 13
L = 204,1 cm²

c. Luas permukaan
L = π.r (r + s)
L = 3,14 . 5 (5 + 13)
L = 15,7 x 18
L = 282,6 cm²

2.a
Luas alas = π.r²
154 = 22/7 . r²
r² = 154 x 7/22
r² = 49
r = √49
r = 7 cm

Luas selimut
L = π.r.s
L = 22/7 . 7 . 13
L = 22 x 13
L = 286 cm²

b. Luas permukaan
L = π.r (r + s)
L = 22/7 . 7 (7 + 13)
L = 22 x 20
L = 440 cm²