PSLEXavier had 3.5 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 = 30, 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 - 4) + (h + 19)
= h + h + h + 2h + h - 4 + 19
= (6 h + 15) cm
(b)
1 m = 100 cm
3.5 m = 350 cm
Total length of ribbon used if h = 30
= 6 h + 15
= 6(30) + 15
= 180 + 15
= 195 cm
Total length of ribbon not used
= 350 - 195
= 155 cm
1 cm = 0.01 m
155 cm = 1.55 m
Answer(s): (a) (6h + 15) cm; (b) 1.55 m