"a tank has two outlets A and B, which together take 6h to empty a full tank when they
Channel: Doubtnut
Date: 2020-04-05

"a tank has two outlets A and B, which together
 take 6h to empty a full tank when they are opened simultaneously. the tank
 was initially half full and both the outlets were opened. After an hour an
 inlet pipe X was also opened. If the inlet alone can fill an empty tank in
 4h, how much time will it now take to fill the tank completely? (in hours)
`8`
b. `7`
c. `9`
d. `8 1/2`"