Aptitude Test for Teachers

Q.  A pipe can fill a tank in 6 hours. Another pipe can empty the tank in 12 hours. If both pipes are opened simultaneously, the part of tank filled by both pipes in 1 hour is?

a. 1/9 th part
b. 1/6 th part
c. 1/12 th part
d. 1/3 rd part


ANSWER: See Answer
 
No explanation is available for this question!
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