tolong jawap pakai cara

d = 20 cm
r = 10 cm
t tabung = 25 cm

Luas permukaan 
= Luas tabung tanpa tutup + 1/2 Luas bola
= π x r ( r + 2t ) + 1/2 x 4 x π x r²
= 3,14 x 10 cm ( 10 cm + 2.25 cm ) + 2 x 3,14 x 10 cm x 10 cm
= 31,4 cm x 60 cm + 2 x 314 cm²
= 1.884 cm² + 628 cm²
= 2.512 cm²