PSLEWill had 1.9 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 = 10, 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 - 7) + (v + 13)
= v + v + v + 3v + v - 7 + 13
= (7 v + 6) cm
(b)
1 m = 100 cm
1.9 m = 190 cm
Total length of thread used if v = 10
= 7 v + 6
= 7(10) + 6
= 70 + 6
= 76 cm
Total length of thread not used
= 190 - 76
= 114 cm
1 cm = 0.01 m
114 cm = 1.14 m
Answer(s): (a) (7v + 6) cm; (b) 1.14 m