A tour of the White House starts every 15 minutes. A tour of…

A tour of the White House starts every 15 minutes. A tour of the Capitol Building starts every 25 minutes.  a.  If the first tour of the day for both tours leaves at 8:30 am, how many minutes will pass until they leave at the same time again? [a] b.  If the first tour of the day for both tours leaves at 8:30 am, what TIME will they leave together again together? [b]