PSLEFabian had 3.4 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 e.
- If e = 19, how much of the thread was not used to make the figure? Leave your answer in meters.
(a)
Total length of thread used
= e + e + e + (2e - 6) + (e + 12)
= e + e + e + 2e + e - 6 + 12
= (6 e + 6) cm
(b)
1 m = 100 cm
3.4 m = 340 cm
Total length of thread used if e = 19
= 6 e + 6
= 6(19) + 6
= 114 + 6
= 120 cm
Total length of thread not used
= 340 - 120
= 220 cm
1 cm = 0.01 m
220 cm = 2.2 m
Answer(s): (a) (6e + 6) cm; (b) 2.2 m