you live 6 miles away from a movie theatre on a particular day it takes you 18 minutes to get to the movie theatre from your house, only half as much time to get home what was your average speed in mph for driving from the theatre, driving home , and the full round trip?

Answer 1

r1*t = 6, r * (18/60) = 6, r1 = 20 mi/h.

r2 * (9/60) = 6, r2 = 40 mi/h.

r = (r1+r2)/2 = 60/2 = 30 mi/h. = Avg. speed when driving to and from the theatre.