Givens ====== d = 2 3/4 t = 1 hour 15 minutes r = ????
Calculations ========== You need to convert the 15 minutes to hours. 1 hour = 60 minutes x hour = 15 minutes
1/60 = x/15 x = 15/60 x = 0.25 hours so the time = 1 hours + 0.25 hours t = 1.25 hours
Now you need to do something with the distance. 3/4 mile = 0.75 of a mile So the distance = 2 + 0.75 = 2.75 miles
Now you are ready for the answer. d = r * t you are looking for r 2.75 = r * 1.25 r = 2.75/1.25 r = 2.2 miles / hour
Note you could do this with fractions. 2 3/4 = 11/4 1 1/4 = 5/4
r = 11/4 // 5/4 =11/5 = 2 1/5 which is the same thing as 2.2. If your calculator can handle fractions (those kind of calculators cost about 10 dollars in Canada. It should be 8 in the US) that might be the way to do this problem.
