PSLEBrandon had 3.6 m of streamer. He used some of it to make the figure as shown.
- How much of the streamer 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 streamer was not used to make the figure? Leave your answer in meters.
(a)
Total length of streamer used
= h + h + h + (3h - 4) + (h + 14)
= h + h + h + 3h + h - 4 + 14
= (7 h + 10) cm
(b)
1 m = 100 cm
3.6 m = 360 cm
Total length of streamer used if h = 30
= 7 h + 10
= 7(30) + 10
= 210 + 10
= 220 cm
Total length of streamer not used
= 360 - 220
= 140 cm
1 cm = 0.01 m
140 cm = 1.4 m
Answer(s): (a) (7h + 10) cm; (b) 1.4 m