16. dbt = 200 cm³/s
p = 100 cm
t = 80 cm
l = 60 cm
V = plt
= (100)(80)(60)
= 480.000 cm³
waktu = V/dbt
= 480.000/200
= 2.400 s
= 2400/60
= 40 menit....(B)
17, 1 kwintal = 100 kg
1 ton = 1000 kg
1250 kg + 2 kwintal - 0,6 ton
= 1250 + 2(100) - 0,6(1000)
= 1250 + 200 - 600
= 850 kg.....(C)
18. s = 50 km
t = 1 jam 15 menit = 1,25 jam
v = s/t
= 50/1,25
= 50 × 100/125
= 2 × 100/5
= 2 × 20
= 40 km/jam.....(A)
19. B. (i), (ii), (iv)