Divide 5 by 6 to get0.8333 ( the 3 keeps repeating)
16/80 = 1/5 just put it into the calculator
Answer: 2hrs?
Step-by-step explanation: 3-2=1+1 hour she took alone = 2hrs

We know that

because of the Pythagorean trig identity

.
I would say it would most certainly have to be B