PSLELee had 3.6 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 c.
- If c = 26, 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 + (3c - 8) + (c + 19)
= c + c + c + 3c + c - 8 + 19
= (7 c + 11) cm
(b)
1 m = 100 cm
3.6 m = 360 cm
Total length of wire used if c = 26
= 7 c + 11
= 7(26) + 11
= 182 + 11
= 193 cm
Total length of wire not used
= 360 - 193
= 167 cm
1 cm = 0.01 m
167 cm = 1.67 m
Answer(s): (a) (7c + 11) cm; (b) 1.67 m