Johnny travels a total of one hour to and from school. On the way there he jogs at 5 miles per hour and on the return trip he gets picked up by the bus and returns home at 25 miles per hour. How far is it to the school? Choose the correct choice from the following answers:
A) 2 miles
B) 4 miles
C) 6.6 miles
D) 8 miles
E) 10 miles
Answer: C) 6.6 miles.   Average speed for round trip = 2*a*b/(a+b), where a,b are speeds   so, average speed was = 2*5*25/(5+25) = 6.6m/hr   the distance between schoolhome should be half of that. ie. 6.6 miles   Answer 6.6 miles
<result>C</result>
Johnny travels a total of one hour to and from school. On the way there he jogs at 5 miles per hour and on the return trip he gets picked up by the bus and returns home at 25 miles per hour. How far is it to the school?