Latest Others Aptitude Question SOLUTION: AN EMPTY TANK CAN B FILLED WITH AN INLET PIPE A IN 42MIN.AFTER 12MIN ,AN OUTLET PIPE B IS OPENED WHICH CAN EMPTY THE TANK IN 30MIN.AFTER 6MIN ANOTHER INLET PIPE C OPENED INTO THE T

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AN EMPTY TANK CAN B FILLED WITH AN INLET PIPE A IN 42MIN.AFTER 12MIN ,AN OUTLET PIPE B IS OPENED WHICH CAN EMPTY THE TANK IN 30MIN.AFTER 6MIN ANOTHER INLET PIPE C OPENED INTO THE TANK ,WHICH CAN FILL IT IN 35MIN,THE TANK IS FILED IN SOME TIME LATER ,.FIND THE TOTAL TIME TO FILL THE TANK

Asked In Others kopal (11 years ago)

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dhyanendra mani tripathi  (11 years ago)

in first 18 minutes the tank filled will be:
18/42-6/30=8/35
so the amount of tank yet to be filled will be 27 parts out of 35 parts i.e. 27/18
now we have 3 pipes 2 inlet and 1 outlet
in 1 min they will fill:
1/42-1/30+1/35=2/105
hence tine required to fill 27/35 of the tank= (27/35)/(2/105)=40.5
hence 18+40.5= 58.5

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Arneet  (11 years ago)

Tank filled in fiorst 18 mins = 12/42 +6/42 - 6/30 = 3/7-1/5 =12/35 tank
remaining tank = 1-12/35= 23/35
with 3 pipes, tank filled in 1 minute = 1/42 +1/35-1/30 = (5+6-7)/210 =4/210 = 2/105

Time taken to fill 23/35 tank = (23/35)*(105/2)= 69/2 min.

total time = 69/2 + 18 = 105/2 mins = 52.5 mins

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