Question

Sally travels to work each day. she travels 12 km east from home to main road. sally then travels 9 km north on the main road to work. if the council was to put a direct road from sally's house to work, how much shorter would her journey be?

a. 6 km
b. 7.94 km
c. 11.06 km
d. 15 km

Answer 1

This way Sally travels 12+9=21 kilometers.
If there was a direct way she could go to work, that way would have been 15 km (because her way to work forms a right-angled triangle).
Therefore her journey would be 21-15=6 km shorter. Choice A.