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Verified answer
11 )a ) Luas = π × r × rr = 14 ÷ 2 = 7 m
= 22/7 × 7 × 7
= 154 m2
b ) 50 kg × 154 m2
= 7700 kg
c ) 7700 kg × Rp 12.000,00
= Rp 92.400.000,00