15. L=2πr (r+t)
=2×3,14×5×(5+5)
=31,4×10
=314 cm(A)
maaf yah nomor 19 sama 20 aku enggak jawab
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15. L=2πr (r+t)
=2×3,14×5×(5+5)
=31,4×10
=314 cm(A)
maaf yah nomor 19 sama 20 aku enggak jawab