PSLEIvan had 2.7 m of rope. He used some of it to make the figure as shown.
- How much of the rope did Andy use to make the figure? Leave your answer in the simplest form in terms of w.
- If w = 18, how much of the rope was not used to make the figure? Leave your answer in meters.
(a)
Total length of rope used
= w + w + w + (2w - 8) + (w + 17)
= w + w + w + 2w + w - 8 + 17
= (6 w + 9) cm
(b)
1 m = 100 cm
2.7 m = 270 cm
Total length of rope used if w = 18
= 6 w + 9
= 6(18) + 9
= 108 + 9
= 117 cm
Total length of rope not used
= 270 - 117
= 153 cm
1 cm = 0.01 m
153 cm = 1.53 m
Answer(s): (a) (6w + 9) cm; (b) 1.53 m