Two pipe A and B can fill a empty tank in 1 hour and 75 minute respectively.and there is pipe C for empty.if all three pipe open together in empty tank then tank get fill in 50 minutes.then in how much time pipe C take to empty the full tank?	Choose the correct choice from the following.
A) 100  B) 90  C) 80  D) 70  E) 60
The work of pipe C in 1 hour=[1/60+1/75-1/50]=1/100   so,pipe C will empty that tank in 100 minute.   answer 100
<result>A</result>
Two pipe A and B can fill a empty tank in 1 hour and 75 minute respectively.and there is pipe C for empty.if all three pipe open together in empty tank then tank get fill in 50 minutes.then in how much time pipe C take to empty the full tank?