Jawab:
19. C
20. D
Penjelasan dengan langkah-langkah:
20.
V = 0,75m x 5 dm x 0,4m
= 75 dm x 5 dm x 4 dm
= 1500 liter
19.
Lal = πr²
314 = 3,14 x r²
r² = 100
r = 10
Lp = Lsel + Lal
= 2πrt + 314
= 2x3,14x10x30 + 314
= 1884 + 314
= 2198
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Jawab:
19. C
20. D
Penjelasan dengan langkah-langkah:
20.
V = 0,75m x 5 dm x 0,4m
= 75 dm x 5 dm x 4 dm
= 1500 liter
19.
Lal = πr²
314 = 3,14 x r²
r² = 100
r = 10
Lp = Lsel + Lal
= 2πrt + 314
= 2x3,14x10x30 + 314
= 1884 + 314
= 2198