Question

Joan can mow a 10-acre field in 5 hours. How long would it take her to mow a 3.8-acre field?
Ms. Sue
Set up a proportion and cross multiply to find the value of x.

10 / 5 = 3.8 / x


sue
I still do not understan this problem can someone please help me out.
Ms. Sue
10 / 5 = 3.8 / x

10x = 19
x = 19/10
x = 1.9 hours = 1 hour, 54 minutes