PSLEOwen 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 i.
- If i = 16, how much of the ribbon was not used to make the figure? Leave your answer in meters.
(a)
Total length of ribbon used
= i + i + i + (2i - 10) + (i + 16)
= i + i + i + 2i + i - 10 + 16
= (6 i + 6) cm
(b)
1 m = 100 cm
2.2 m = 220 cm
Total length of ribbon used if i = 16
= 6 i + 6
= 6(16) + 6
= 96 + 6
= 102 cm
Total length of ribbon not used
= 220 - 102
= 118 cm
1 cm = 0.01 m
118 cm = 1.18 m
Answer(s): (a) (6i + 6) cm; (b) 1.18 m