There are 60 seconds in 1 minute. 21 minutes and 15 seconds is
http://www.chacha.com/question/howtoconvert21m...

Divide by 60, so 60 seconds turns out to be 1 minute.
http://wiki.answers.com/Q/What_is_the_ratio_in_con...

1 minute=60 seconds. So multiply 242 by 60. It is equal to 14520 seconds. Hope this helps:
http://answers.yahoo.com/question/index?qid=201111...
