Jenny driving
If Jenny:-
drives 3.4 miles to go to the shop,
then drives 8.5 miles to get to her friend's house,
before driving a further 7 miles to go into town and...
finally driving the full 18.9 miles to get back to her house at the end of the day.
drives 3.4 miles to go to the shop,
then drives 8.5 miles to get to her friend's house,
before driving a further 7 miles to go into town and...
finally driving the full 18.9 miles to get back to her house at the end of the day.
Spoiler: