Tolong dibantu ya,pakai caranya.Thanks

Bab Bangun Datar

L gabungan = r^2 + 2 × 3/4 × π × r^2
560 = r^2 + 3/2 × 22/7 × r^2
560 = 7/7 r^2 + 33/7 r^2
40/7 r^2 = 560
r^2 = 560 × 7/40
r^2 = 98 cm^2