Please help me!! I really need to know how to do the steps i am struggling:(

Combined megan and kelly worked 60 hours. kelly worked twice as many hours as megan. how many hours did they each worked?

News cameras take an overhead picture of a crowd at an outdoor event journalist then count the total number of people in the picture and use the sample of estimate the total number of people in the crowd this process is an example of

Shryia read a 481 -page-long book cover to cover in a single session, at a constant rate. after reading for 1.5 hours, she had 403 pages left to read. how fast was shryia reading? pages per hour how long did it take her to read the entire book? hours plz i realy need this