on a bike trip erika drives 5 miles in the first 30 minutes and 13 miles in the next hour. what is her average speed?

Question

help me please i need it like plzzzz

Answer 1

For speed we like to use the units miles per hour ---> mph 

 

Since Erika travels 5 miles in 30 minutes her rate is 5 miles/ 30 minutes , we need to convert to miles/hr , 30 minutes is 0.5 hr  so --->  5 miles/0.5 hr ,  when we do the division to find the rate we get 10 miles / 1 hr -->

 

10 mph 

 

The next hour she travels 13 miles in 1 hour so her rate is

 

 

13 mph 

 

Finally, we need to average the 2 speeds --->  ( 10 + 13) / 2  --->  23/2 = 11.5 mph average