document.write( "Question 691734: 1 pump can empty a tank in 8hr. and 15 min. another pump can empty the same tank in 11 hr how long will it take to empty the same tank with both pumps running at the same time.
\n" ); document.write( "
\n" ); document.write( "

Algebra.Com's Answer #426826 by sachi(548)\"\" \"About 
You can put this solution on YOUR website!
1 pump can empty a tank in 8hr. and 15 min=8+15/60 hr=33/4 hrs
\n" ); document.write( "so in 1 hr it will empty 4/33 parts
\n" ); document.write( "another pump can empty the same tank in 11 hr
\n" ); document.write( "so in 1 hr it will empty 1/11 parts
\n" ); document.write( "with both pumps running at the same time
\n" ); document.write( "in 1 hr both can empty 4/33+1/11=7/33 parts
\n" ); document.write( "so the time taken is 33/7 hrs=4 hrs 43 min approx to empty the same tank with both pumps running at the same time.
\n" ); document.write( "
\n" );