PSLEDaniel had 3.3 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 z.
- If z = 26, how much of the rope was not used to make the figure? Leave your answer in meters.
(a)
Total length of rope used
= z + z + z + (3z - 10) + (z + 13)
= z + z + z + 3z + z - 10 + 13
= (7 z + 3) cm
(b)
1 m = 100 cm
3.3 m = 330 cm
Total length of rope used if z = 26
= 7 z + 3
= 7(26) + 3
= 182 + 3
= 185 cm
Total length of rope not used
= 330 - 185
= 145 cm
1 cm = 0.01 m
145 cm = 1.45 m
Answer(s): (a) (7z + 3) cm; (b) 1.45 m