melissa can roller skate 10 miles in 2 hours. How long will she take to travel a distance of 65 miles?

Question

the subject is distance rate and time 

Answer 1

Let X be the total distance travelled = 10 miles , Let t be the total time of travel = 2 hrs 

 

Therefore The average speed of melissa,  V_avge = Distance travelled / time = x/t = 10 miles/2hrs = 5 miles/hr

 

For a distance of 65 miles , the total time needed = x / V_avge = 65 miles / 5 miles/hr = 13 hrs