The density is 0.1019g/cm3
Answer: https://www.algebra.com/algebra/homework/word/misc/Miscellaneous_Word_Problems.faq.question.834312.html
Maybe this will help?
The numbers are 15 and 105.
Lin thought a two digit number that is 15, if we multiply 15 with 7 , 15 x 7 = 105 that is we get Jen's number.and if we put 0 between the two digits of Lin's number, we also get Jen's number;that is 105.