Question

Pipe S can file cister
Sand Pipe kfill a cistern
in 3 hours Pipe y can empty it in 5 hours Supposing
all the pipes are turned on when the cistern is
completely empty, how long will it take to fill?
O a 30 31 H
6.1+11/19H
OG 30/21 Hr
n​

Answer 1

Step-by-step explanation:

Joaokskskkzkkxkxiididiididiififijfjfk

Answer 2

Step-by-step explanation:

P Y

3 5

15

P efficiency = 5

Y efficiency = -3

total efficiency =2

time = 15/2 hr....