PSLEWesley had 3.2 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 h.
- If h = 19, 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 + (3h - 10) + (h + 18)
= h + h + h + 3h + h - 10 + 18
= (7 h + 8) cm
(b)
1 m = 100 cm
3.2 m = 320 cm
Total length of ribbon used if h = 19
= 7 h + 8
= 7(19) + 8
= 133 + 8
= 141 cm
Total length of ribbon not used
= 320 - 141
= 179 cm
1 cm = 0.01 m
179 cm = 1.79 m
Answer(s): (a) (7h + 8) cm; (b) 1.79 m