Two pipes can fill a tank in 10 and 12 hours, while third pipe will make the tank empty in 20 hours....
Two pipes can fill a tank in 10 and 12 hours, while third pipe will make the tank empty in 20 hours. If all three pipes operate simultaneously. In how many hours the tank will be filled ?
Answer/Solution
7.5 Hours
Steps/Work
In 1 hour it fill 1/10 + 1/12 - 1/20 = 8/60
So fill tank fillup in 60/8 = 7.5 Hours
ANSWER:B
So fill tank fillup in 60/8 = 7.5 Hours
ANSWER:B