pooh969owys2a
20.02.2020 •
Mathematics
A pipe can fill a cistern in 30 minutes and a waste-pipe can empty it in 1 hour. If both pipes are opened at once when the cistern is empty, how long will it take to fill the cistern?
plz plz solve it..I am confused
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Ответ:
answer:
30 minutes
Step-by-step explanation:
There giving you extra information to confuse you but its ok
Ответ:
a, b, d, f
Step-by-step explanation:
1. E
2. D
3. G
4. E
5. N
6. U
7. I
8. T
9. Y