PSLELuke 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 g.
- If g = 18, how much of the wire was not used to make the figure? Leave your answer in meters.
(a)
Total length of wire used
= g + g + g + (2g - 6) + (g + 16)
= g + g + g + 2g + g - 6 + 16
= (6 g + 10) cm
(b)
1 m = 100 cm
2.3 m = 230 cm
Total length of wire used if g = 18
= 6 g + 10
= 6(18) + 10
= 108 + 10
= 118 cm
Total length of wire not used
= 230 - 118
= 112 cm
1 cm = 0.01 m
112 cm = 1.12 m
Answer(s): (a) (6g + 10) cm; (b) 1.12 m