PSLEWill had 2.2 m of thread. He used some of it to make the figure as shown.
- How much of the thread did Andy use to make the figure? Leave your answer in the simplest form in terms of p.
- If p = 17, how much of the thread was not used to make the figure? Leave your answer in meters.
(a)
Total length of thread used
= p + p + p + (2p - 8) + (p + 16)
= p + p + p + 2p + p - 8 + 16
= (6 p + 8) cm
(b)
1 m = 100 cm
2.2 m = 220 cm
Total length of thread used if p = 17
= 6 p + 8
= 6(17) + 8
= 102 + 8
= 110 cm
Total length of thread not used
= 220 - 110
= 110 cm
1 cm = 0.01 m
110 cm = 1.1 m
Answer(s): (a) (6p + 8) cm; (b) 1.1 m