A Cistern Is Filled By Pipe A In 8 Hrs And The Full Cistern Can Be Le

1.	A Cistern Is Filled By Pipe A In 8 Hrs And The Full Cistern Can Be Leaked Out By An Exhaust Pipe B In 12 Hrs. If Both The Pipes Are Opened In What Time The Cistern Is Full?
Answer» Pipe A can FILL 1/8 of the CISTERN in 1 hour. Pipe B can empty 1/12 of the cistern in 1 hour Both Pipe A and B TOGETHER can EFFECTIVELY fill 1/8-1/12=1/24 of the cistern in 1 hour i.e, the cistern will be full in 24 hrs. Pipe A can fill 1/8 of the cistern in 1 hour. Pipe B can empty 1/12 of the cistern in 1 hour Both Pipe A and B together can effectively fill 1/8-1/12=1/24 of the cistern in 1 hour i.e, the cistern will be full in 24 hrs.

A Cistern Is Filled By Pipe A In 8 Hrs And The Full Cistern Can Be Leaked Out By An Exhaust Pipe B In 12 Hrs. If Both The Pipes Are Opened In What Time The Cistern Is Full?

Answer»

Pipe A can FILL 1/8 of the CISTERN in 1 hour.

Pipe B can empty 1/12 of the cistern in 1 hour

Both Pipe A and B TOGETHER can EFFECTIVELY fill 1/8-1/12=1/24 of the cistern in 1 hour

i.e, the cistern will be full in 24 hrs.

Pipe A can fill 1/8 of the cistern in 1 hour.

Pipe B can empty 1/12 of the cistern in 1 hour

Both Pipe A and B together can effectively fill 1/8-1/12=1/24 of the cistern in 1 hour

i.e, the cistern will be full in 24 hrs.