A turtle was walking 3/10 per hour and takes 13/20 hours to get from home to seashore, how long will it take if the turtle doubles its speed?

Question

a turtle walking out an average speed of 3 mph takes 13/20 hours to walk from home to the seashore how long will the journey take if the turtle double-dip average speed

Answer 1

Since the distance there and back is the same, doubling the speed shall halve the time.

 

(13/20)(1/2)

13/40 hours