PSLERael had 2.9 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 m.
- If m = 17, how much of the thread was not used to make the figure? Leave your answer in meters.
(a)
Total length of thread used
= m + m + m + (3m - 4) + (m + 12)
= m + m + m + 3m + m - 4 + 12
= (7 m + 8) cm
(b)
1 m = 100 cm
2.9 m = 290 cm
Total length of thread used if m = 17
= 7 m + 8
= 7(17) + 8
= 119 + 8
= 127 cm
Total length of thread not used
= 290 - 127
= 163 cm
1 cm = 0.01 m
163 cm = 1.63 m
Answer(s): (a) (7m + 8) cm; (b) 1.63 m