PSLELuis had 3.3 m of wire. He used some of it to make the figure as shown.
- How much of the wire did Andy use to make the figure? Leave your answer in the simplest form in terms of p.
- If p = 30, how much of the wire was not used to make the figure? Leave your answer in meters.
(a)
Total length of wire used
= p + p + p + (2p - 8) + (p + 17)
= p + p + p + 2p + p - 8 + 17
= (6 p + 9) cm
(b)
1 m = 100 cm
3.3 m = 330 cm
Total length of wire used if p = 30
= 6 p + 9
= 6(30) + 9
= 180 + 9
= 189 cm
Total length of wire not used
= 330 - 189
= 141 cm
1 cm = 0.01 m
141 cm = 1.41 m
Answer(s): (a) (6p + 9) cm; (b) 1.41 m