PSLEPerry had 3.8 m of rope. He used some of it to make the figure as shown.
- How much of the rope did Andy use to make the figure? Leave your answer in the simplest form in terms of t.
- If t = 27, how much of the rope was not used to make the figure? Leave your answer in meters.
(a)
Total length of rope used
= t + t + t + (2t - 6) + (t + 20)
= t + t + t + 2t + t - 6 + 20
= (6 t + 14) cm
(b)
1 m = 100 cm
3.8 m = 380 cm
Total length of rope used if t = 27
= 6 t + 14
= 6(27) + 14
= 162 + 14
= 176 cm
Total length of rope not used
= 380 - 176
= 204 cm
1 cm = 0.01 m
204 cm = 2.04 m
Answer(s): (a) (6t + 14) cm; (b) 2.04 m