PSLEMichael had 3.7 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 = 20, 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 - 6) + (h + 20)
= h + h + h + 3h + h - 6 + 20
= (7 h + 14) cm
(b)
1 m = 100 cm
3.7 m = 370 cm
Total length of streamer used if h = 20
= 7 h + 14
= 7(20) + 14
= 140 + 14
= 154 cm
Total length of streamer not used
= 370 - 154
= 216 cm
1 cm = 0.01 m
216 cm = 2.16 m
Answer(s): (a) (7h + 14) cm; (b) 2.16 m