One pipe can fill an empty cistern in 4 hours while another can drain the cistern when full in 10 hours. Both the pipes were turned on when the cistern was half-empty. How long will it take for the cistern to be full?
Read the given statement and identify which of the given conclusion(s) logically follow(s) from the statement. Statement: Death keeps no calendar. Conclusions: 1. Man must die one day. 2. Death can come at any time.