Pipe A can fill a tank in 4 hours and pipe B can fill it 6 hours. If they are opened on alternate hours and if pipe A is opened first then in how many hours, the tank shall be full ?

Pipe A can fill a tank in 4 hours and pipe B can fill it 6 hours. If t

1.	Pipe A can fill a tank in 4 hours and pipe B can fill it 6 hours. If they are opened on alternate hours and if pipe A is opened first then in how many hours, the tank shall be full ?
A.	${\text{4}}\frac{1}{2}$$ hours
B.	${\text{4}}\frac{2}{3}$$ hours
C.	${\text{3}}\frac{1}{2}$$ hours
D.	${\text{3}}\frac{1}{4}$$ hours
Answer» C. ${\text{3}}\frac{1}{2}$$ hours

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Pipe A can fill a tank in 4 hours and pipe B can fill it 6 hours. If they are opened on alternate hours and if pipe A is opened first then in how many hours, the tank shall be full ?

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