Problem solving

Question

six house are spaced equally around a circular road. if it takes 20 minutes to walk from the first house to the third house, how long would it take to walk all the way around the road?

Answer 1

House 1 to house 3 = 20

House 3 to house 5 = 20

House 5 to house 6 = 10 mins

                              -------------

                                50 mins