DB45
17) d = 5 cm, r = 2,5 cm, t = 14 cm V lilin = π r² t = 22/7 x (2,5)² (14) = 275 cm³
lama lilin terbakar = V lilin / 5 cm³ x 5 menit lama = 275 / 5 x 5 mnit= 275 menit
18) r= 1 m = 10 dm Volume air = 157 liter = 157 dm³ Luas alas tangki = πr² = 3.14 x 100 = 314 dm² t air dalam tangki = Volume air / luas alas tangki t air = 157 dm³ / 314 dm² = 0,5 dm= 5 cm
d = 5 cm, r = 2,5 cm, t = 14 cm
V lilin = π r² t = 22/7 x (2,5)² (14) = 275 cm³
lama lilin terbakar = V lilin / 5 cm³ x 5 menit
lama = 275 / 5 x 5 mnit= 275 menit
18) r= 1 m = 10 dm
Volume air = 157 liter = 157 dm³
Luas alas tangki = πr² = 3.14 x 100 = 314 dm²
t air dalam tangki = Volume air / luas alas tangki
t air = 157 dm³ / 314 dm² = 0,5 dm= 5 cm