Question

Nick went bike ride to the store 5 miles away.If it took nick 1/2 of an hour to get there and 2/5 to get back,what was his average rate of speed

Answer 1

Answer:

11.1m/s

Step-by-step explanation:

Given parameters:

Distance of store  = 5miles

Time to store = $\frac{1}{2}$hr

Time from store  = $\frac{2}{5}$hr

Unknown:

Average speed  = ?

Solution:

Average speed is the total distance divided by the total time taken.

   Average speed  = $\frac{total distance}{total time taken}$  

Total distance  = distance to store + distance from store  = 5 + 5 = 10miles

Total time taken  =  $\frac{1}{2}$hr +  $\frac{2}{5}$hr = $\frac{9}{10}$hr

Average speed  = $\frac{10}{\frac{9}{10} }$   = 10 x $\frac{10}{9}$   = 11.1m/s