Brendon walked up some steps and ran 18 steps up a flight of steps in 216 s.

In an identical flight of steps , he walked up some steps and ran 30 steps up in 144 s.

(a) How much shorter is the duration of a running step compared to the duration of a walking step?

(b) How long would Brendon take to walk up each flight of steps?

Notes to student:

1. If the question above has parts, (e.g. (a) and (b)), given that the answer for part (a) is 10 and the answer for part (b) is 12, give your answer as:10,12