PSLEPeter had 2.2 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 = 11, 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 - 5) + (m + 15)
= m + m + m + 2m + m - 5 + 15
= (6 m + 10) cm
(b)
1 m = 100 cm
2.2 m = 220 cm
Total length of ribbon used if m = 11
= 6 m + 10
= 6(11) + 10
= 66 + 10
= 76 cm
Total length of ribbon not used
= 220 - 76
= 144 cm
1 cm = 0.01 m
144 cm = 1.44 m
Answer(s): (a) (6m + 10) cm; (b) 1.44 m