An outlet pipe can empty 2/3 rd of a cistern in 20 minutes. In 8 minutes, what part of the cistern will be emptied?	Choose one.
A) 4/9  B) 4/3  C) 4/2  D) 4/8  E) 4/15
2/3 ---- 20   ? ----- 8 ==&gt; 4/15   Answer: 4/15
<result>E</result>
An outlet pipe can empty 2/3 rd of a cistern in 20 minutes. In 8 minutes, what part of the cistern will be emptied?