PSLEFabian had 3.3 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 m.
- If m = 13, how much of the ribbon was not used to make the figure? Leave your answer in meters.
(a)
Total length of ribbon used
= m + m + m + (2m - 9) + (m + 16)
= m + m + m + 2m + m - 9 + 16
= (6 m + 7) cm
(b)
1 m = 100 cm
3.3 m = 330 cm
Total length of ribbon used if m = 13
= 6 m + 7
= 6(13) + 7
= 78 + 7
= 85 cm
Total length of ribbon not used
= 330 - 85
= 245 cm
1 cm = 0.01 m
245 cm = 2.45 m
Answer(s): (a) (6m + 7) cm; (b) 2.45 m