PSLEPaul had 2.6 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 h.
- If h = 20, how much of the ribbon was not used to make the figure? Leave your answer in meters.
(a)
Total length of ribbon used
= h + h + h + (2h - 10) + (h + 12)
= h + h + h + 2h + h - 10 + 12
= (6 h + 2) cm
(b)
1 m = 100 cm
2.6 m = 260 cm
Total length of ribbon used if h = 20
= 6 h + 2
= 6(20) + 2
= 120 + 2
= 122 cm
Total length of ribbon not used
= 260 - 122
= 138 cm
1 cm = 0.01 m
138 cm = 1.38 m
Answer(s): (a) (6h + 2) cm; (b) 1.38 m