PSLEBobby had 2.9 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 t.
- If t = 28, how much of the streamer was not used to make the figure? Leave your answer in meters.
(a)
Total length of streamer used
= t + t + t + (2t - 6) + (t + 20)
= t + t + t + 2t + t - 6 + 20
= (6 t + 14) cm
(b)
1 m = 100 cm
2.9 m = 290 cm
Total length of streamer used if t = 28
= 6 t + 14
= 6(28) + 14
= 168 + 14
= 182 cm
Total length of streamer not used
= 290 - 182
= 108 cm
1 cm = 0.01 m
108 cm = 1.08 m
Answer(s): (a) (6t + 14) cm; (b) 1.08 m