A tap can fill a tank in 6 hours. 3 more similar taps are opened after half the tank is filled. what is the total time taken to fill the tank completely?
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1 tank filled in 6 hours
1/2 tank will fill in 6/2=3 hours
1/2 tank is left
by inverse proportion
x1y1=x2y2
=1/3=3/x
=1*3=3x
=3x=3
=x=3/3=1hour
therefore total time is 3+1=4 hours
1/2 tank will fill in 6/2=3 hours
1/2 tank is left
by inverse proportion
x1y1=x2y2
=1/3=3/x
=1*3=3x
=3x=3
=x=3/3=1hour
therefore total time is 3+1=4 hours
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