PSLESam had 2.3 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 = 19, 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 - 3) + (p + 15)
= p + p + p + 2p + p - 3 + 15
= (6 p + 12) cm
(b)
1 m = 100 cm
2.3 m = 230 cm
Total length of wire used if p = 19
= 6 p + 12
= 6(19) + 12
= 114 + 12
= 126 cm
Total length of wire not used
= 230 - 126
= 104 cm
1 cm = 0.01 m
104 cm = 1.04 m
Answer(s): (a) (6p + 12) cm; (b) 1.04 m