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Pipe A can fill a tank in 20 min and pipe B can empty a tank in 40 min. How many minutes will it take
to fill the tank if 11

By Ava

Pipe A can fill a tank in 20 min and pipe B can empty a tank in 40 min. How many minutes will it take
to fill the tank if 11 A pipes and 12 B pipes fill and empty the tank all at once, respectively?
2.6
10
O
5
O
4​

About the author
Ava

find the value of k for which the
system of linnear
equations
3x – 4y +7=0
KX +3y-520
20 has unique solu

Show that
sin 52° sin 38º- cos 52° cos 38°=0
[tex] \sin(52) \sin(38) – \cos(52) \cos(38) = 0[/tex]
​

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