PSLEElijah had 2.7 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 q.
- If q = 14, how much of the wire was not used to make the figure? Leave your answer in meters.
(a)
Total length of wire used
= q + q + q + (3q - 7) + (q + 12)
= q + q + q + 3q + q - 7 + 12
= (7 q + 5) cm
(b)
1 m = 100 cm
2.7 m = 270 cm
Total length of wire used if q = 14
= 7 q + 5
= 7(14) + 5
= 98 + 5
= 103 cm
Total length of wire not used
= 270 - 103
= 167 cm
1 cm = 0.01 m
167 cm = 1.67 m
Answer(s): (a) (7q + 5) cm; (b) 1.67 m