PSLEDaniel had 3.3 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 = 18, 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 - 8) + (m + 19)
= m + m + m + 3m + m - 8 + 19
= (7 m + 11) cm
(b)
1 m = 100 cm
3.3 m = 330 cm
Total length of thread used if m = 18
= 7 m + 11
= 7(18) + 11
= 126 + 11
= 137 cm
Total length of thread not used
= 330 - 137
= 193 cm
1 cm = 0.01 m
193 cm = 1.93 m
Answer(s): (a) (7m + 11) cm; (b) 1.93 m