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d = 6 cm
r = 3 cm
s = √3²+4² = √9+16 = √25 = 5 cm
Lp peluru = πrs + πr(r+2t)
= πr(r + s + 2t)
= 22/7 x 3 x ( 3 + 5 + 2x13)
= 66/7 x 34
= 320,57