Time = Distance over speed help?
So were doing an assignment which involves using distance over speed. I have the answers, except my teacher has marked them wrong and I don't understand why.
I put:
16.2/8 = 2.025
0.025*60 = 1.5
= 2 hours 2 mins (rounded up from 1.5)
She circled the answer and said it should be 2hrs 15 minutes. Why?
She's also said the following are wrong:
14.6/8 = 1.825
0.825*60 = 49.5
= 1 hour 50 mins
And
0.9/8 = 0.1125
0.1125*60= 6.75
= 1 hour 7mins
She's said they're all wrong. I don't understand why. Please help?