PSLEJenson had 2.8 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 c.
- If c = 13, how much of the wire was not used to make the figure? Leave your answer in meters.
(a)
Total length of wire used
= c + c + c + (2c - 10) + (c + 18)
= c + c + c + 2c + c - 10 + 18
= (6 c + 8) cm
(b)
1 m = 100 cm
2.8 m = 280 cm
Total length of wire used if c = 13
= 6 c + 8
= 6(13) + 8
= 78 + 8
= 86 cm
Total length of wire not used
= 280 - 86
= 194 cm
1 cm = 0.01 m
194 cm = 1.94 m
Answer(s): (a) (6c + 8) cm; (b) 1.94 m