Question

profa necesito que me resuelvan desde la 19 en adelante voy a dar 30puntos hay esta la imagen

Answer 1

Al parecer las respuestas están al ultimo

Answer 2

19.
va = 90L/90 s = 1L/s
vb = 120L/45s = 8/3 L/s

1h 40 min = 3600+40*60 = 6000 s
d = 1*6000 + (8/3)*6000 = 22000 L
Rpta D)

20.
d/3 = va*360
va = d/1080

d/2 = vb*360
vb = d/720

d = va*t+vb*t
d = (d/1080)*t+(d/720)*t
1 = t/1080 + t/720
1 = t/432
t = 432 segundos
432 = 7*60 + 12
Se demoran 7 minutos y 12 segundos
Rpta D)

21.
d = vg*10
vg = d/10

d = vd*12
vd = d/12

d = vg*t-vd*t
d = (d/10)*t-(d/12)*t
1 = t/10-t/12
1 = t/60
t = 60 horas
Rpta D)

22.
d = va*15
va = d/15

d = vb*40
vb = d/40

d = va*t - vb*t
d = (d/15)*t - (d/40)*t
1 = t/15 - t/40
1 = t/24
t = 24 minutos
Rpta c)

23.
d = va*8 + vb*8
d = va*10
va = d/10
d = (d/10)*8 + vb*8
d/5 = vb*8
vb = d/40
d = vb*40
Se demoraria 40 horas
Rpta a)

24.
d = va*3
va = d/3

d = vb*4
vb = d/4

(3/4)d = va*t + vbt
(3/4)d = (d/3)*t + (d/4)*t
3/4 = t/3 + t/4
3/4 = 7t/12
t = 9/7 h
Rpta b)

25.
d = va*8
va = d/8

d = vb*6
vb = d/6

d = vc*4
vc = d/4

d = va*t + vb*t - vc*t
d = (d/8)*t + (d/6)*t - (d/4)*t
1 = t/8 + t/6 - t/4
1 = t/24
t = 24 horas
Rpta D)