PSLEOwen had 3.5 m of thread. He used some of it to make the figure as shown.
- How much of the thread did Andy use to make the figure? Leave your answer in the simplest form in terms of v.
- If v = 23, how much of the thread was not used to make the figure? Leave your answer in meters.
(a)
Total length of thread used
= v + v + v + (3v - 6) + (v + 16)
= v + v + v + 3v + v - 6 + 16
= (7 v + 10) cm
(b)
1 m = 100 cm
3.5 m = 350 cm
Total length of thread used if v = 23
= 7 v + 10
= 7(23) + 10
= 161 + 10
= 171 cm
Total length of thread not used
= 350 - 171
= 179 cm
1 cm = 0.01 m
179 cm = 1.79 m
Answer(s): (a) (7v + 10) cm; (b) 1.79 m