The elevator in an eleven-storied office building travels at the rate of one floor per 1/4 minute, which allows time for picking up and letting down passengers. At the main floor and at the top floor the operator stops for 1 minute. How many complete (with return) trips will the operator makes during a 7-hour period?

প্রশ্নের তথ্য সংক্ষেপ

• প্রশ্ন আইডি #২৬৪৯৬
• বিষয় Bank Preparation
• ধরন Single Choice