Luas permukaan bangun tersebut adalah…cm2 a.4.928 b.4.932 c.4.946 d.4.952

Luas permukaan :

Lp = 2 × π × r × ( r + t )

Lp = 2 × 22/7 × 14 cm × ( 14 cm + 42 cm )

Lp = 2 × 22/7 × 14 cm × 56 cm

Lp = 2 × 22/7 × 784 cm

Lp = 2 × 17.248cm/7

Lp = 2 × 2.464 cm

Lp = 4.928 cm²