A tap can fill a tank in 16 minutes and another tap can empty it in 8 minutes. If the tank is already half full and both the taps are opened together, the tank will be
A. filled in 15 min
B. filled in 8 min
C. emptied in 12 min
D. emptied in 8 min
E. emptied in 15 min
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ans 8 min to be emptied
empt in 8 min
D
b
C
filled with in 8minutes & Empty in 4minutes
c
half will be emptied in 4 min and that 4 min filling will be emptied in 2 min than 2:1 than 1:30 sec so best possible ans is D emptied in 8 min
filled in 8 min
E
D
filled in 8 minutes
Emptied in 8 mintues.
First tab fill water in 1 minute=1/16 of full tank
Second tab empty water in 1 minute =1/8 of full tank
so,tank will empty in 1 minute=(1/8-1/16)=1/16 of full tank
so half full tank will be empty in =(1/2)/(1/16)=8 minute
D