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Verified answer
1/2 luas lingkaran besar (r = 6,5 + 3,5 = 10)= 1/2 (3,14) (100)
= 314/2
= 157
1/2 luas lingkaran kecil (r = 3,5)
= 1/2 (22/7) (7/2) (7/2)
= (11/7)(49/4)
= 77/4
= 19.25
luas daerah yang diarsir
157 - 19,25
= 137,75