PSLEGeorge had 2.6 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 z.
- If z = 11, how much of the wire was not used to make the figure? Leave your answer in meters.
(a)
Total length of wire used
= z + z + z + (2z - 8) + (z + 17)
= z + z + z + 2z + z - 8 + 17
= (6 z + 9) cm
(b)
1 m = 100 cm
2.6 m = 260 cm
Total length of wire used if z = 11
= 6 z + 9
= 6(11) + 9
= 66 + 9
= 75 cm
Total length of wire not used
= 260 - 75
= 185 cm
1 cm = 0.01 m
185 cm = 1.85 m
Answer(s): (a) (6z + 9) cm; (b) 1.85 m