What is the answer 72%devided by 300​

Bob can paint a fence in 5 hours, and working with jen the two of them painted a fence in 2 hours. how long would it have taken jen to paint the fence alone?

In circumscribed square eart, ae=8, et=12, and rt=17. find ar.

In class 6b, 20% of the pupils wear glasses. 28 pupils do not wear glasses. (a.) how many pupils are there in class 6b (b.) how many pupils wear glasses? -with solution please thank you and