tolang yaa... yang ini lagi... saya tunggu....

[tex]lp = lp \: tabung \: tanpa \: tutup + lp \: kerucut \: tanpa \: alas \\ = (2 \times \pi \times r \times t) + (\pi \times r {}^{2} ) + (\pi \times r \times s) \\ = (2 \times \frac{22}{7} \times 7 \times 15) + ( \frac{22}{7} \times 7 {}^{2} ) + ( \frac{22}{7} \times 7 \times 25) \\ = 660 + 154 + 550 \\ = 1364 \: cm {}^{2} (c)[/tex]

r = 7 s = 25
Lp =LSkrct + LStab + Llingkaran
= πrs + 2πrt + πr²
= πr ( s + 2t + r )
= 22 / 7. ( 25 + 2.15 + 7 )
= 22. 62
= 1364 cm²