PSLEFabian 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 h.
- If h = 14, how much of the wire was not used to make the figure? Leave your answer in meters.
(a)
Total length of wire used
= h + h + h + (3h - 4) + (h + 12)
= h + h + h + 3h + h - 4 + 12
= (7 h + 8) cm
(b)
1 m = 100 cm
2.3 m = 230 cm
Total length of wire used if h = 14
= 7 h + 8
= 7(14) + 8
= 98 + 8
= 106 cm
Total length of wire not used
= 230 - 106
= 124 cm
1 cm = 0.01 m
124 cm = 1.24 m
Answer(s): (a) (7h + 8) cm; (b) 1.24 m