PSLEPerry had 3.3 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 s.
- If s = 24, how much of the rope was not used to make the figure? Leave your answer in meters.
(a)
Total length of rope used
= s + s + s + (2s - 7) + (s + 20)
= s + s + s + 2s + s - 7 + 20
= (6 s + 13) cm
(b)
1 m = 100 cm
3.3 m = 330 cm
Total length of rope used if s = 24
= 6 s + 13
= 6(24) + 13
= 144 + 13
= 157 cm
Total length of rope not used
= 330 - 157
= 173 cm
1 cm = 0.01 m
173 cm = 1.73 m
Answer(s): (a) (6s + 13) cm; (b) 1.73 m