Richie hopped on his bicycle and rode to the park at 15mph. On the way back he rode at 20mph if the whole trip took 7 hours how far away is the park

Answer 1

He rode T hours at 15 mph and (7-T) hours at 20 mph and covered the same distance each way, i.e.

15T = 20(7-T) => 15T = 140 - 20T

35T = 140 => T = 4

and 15*4 = 60 miles