As a freelancer, Katherine takes 20 hours to develop a website for her clients. Her junior, Naomi, takes 1/4 times more time to complete creating a similar website. If many clients required her to build their websites in a particular year, and she gave her junior 30 websites to develop, calculate the total number of hours Katherine's junior took to create the 30 websites.
Katherine's junior takes 1/4*20 = <<1/4*20=5>>5 more hours to build a similar website as Katherine.
The total number of hours Katherine's junior takes to build a website is 20+5 = <<20+5=25>>25 hours.
If Katherine gave her junior 30 websites to build, her junior spent 30*25 = <<30*25=750>>750 hours on building the 30 websites.
#### 750