PSLENeave 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 m.
- If m = 11, how much of the wire was not used to make the figure? Leave your answer in meters.
(a)
Total length of wire used
= m + m + m + (2m - 8) + (m + 20)
= m + m + m + 2m + m - 8 + 20
= (6 m + 12) cm
(b)
1 m = 100 cm
3.3 m = 330 cm
Total length of wire used if m = 11
= 6 m + 12
= 6(11) + 12
= 66 + 12
= 78 cm
Total length of wire not used
= 330 - 78
= 252 cm
1 cm = 0.01 m
252 cm = 2.52 m
Answer(s): (a) (6m + 12) cm; (b) 2.52 m