PSLEJohn had 3.6 m of ribbon. He used some of it to make the figure as shown.
- How much of the ribbon did Andy use to make the figure? Leave your answer in the simplest form in terms of s.
- If s = 29, how much of the ribbon was not used to make the figure? Leave your answer in meters.
(a)
Total length of ribbon used
= s + s + s + (2s - 4) + (s + 17)
= s + s + s + 2s + s - 4 + 17
= (6 s + 13) cm
(b)
1 m = 100 cm
3.6 m = 360 cm
Total length of ribbon used if s = 29
= 6 s + 13
= 6(29) + 13
= 174 + 13
= 187 cm
Total length of ribbon not used
= 360 - 187
= 173 cm
1 cm = 0.01 m
173 cm = 1.73 m
Answer(s): (a) (6s + 13) cm; (b) 1.73 m