"28 days. On day 28 he will be 27 feet from the top and jump out." was previously posted. This is the correct answer to the posed mathematical problem. Given that the question contains grammatical/punctuation/syntax errors, it is logical to assume that this is the answer that is being sought. It occurs to me however, that someone may fancy themselves an awfully clever soul, and will not be satisfied until the difference between jumping and crawling is duly noted. Please to consider it so.
Answer is 28 days
27 days = 27 feet 28th day = 27 + 3 feet = 30 feet
Two racers are each wearing three-digit numbers The difference between their numbers is 378 The sum of the three digits of each person's number is 12 and neither person has any of the same digits worn?