luas lingkarannya 962,5cm2,berapa diameternya

[ Rumus Luas Lingkaran = π r² ]

L = π r²,

962,5 cm² = 22/7 . r²

r² = 962,5cm² : (22/7)

r² = 962,5cm² (7/22)

r² = 306,25

r = √306,25

r = 17,5 cm

[ Diameter = 2 . r ]

D = 2 (17,5)

D = 35 cm