PSLEOliver had 3.8 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 = 17, 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 - 8) + (v + 17)
= v + v + v + 3v + v - 8 + 17
= (7 v + 9) cm
(b)
1 m = 100 cm
3.8 m = 380 cm
Total length of thread used if v = 17
= 7 v + 9
= 7(17) + 9
= 119 + 9
= 128 cm
Total length of thread not used
= 380 - 128
= 252 cm
1 cm = 0.01 m
252 cm = 2.52 m
Answer(s): (a) (7v + 9) cm; (b) 2.52 m