PSLEJapheth 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 t.
- If t = 17, how much of the thread was not used to make the figure? Leave your answer in meters.
(a)
Total length of thread used
= t + t + t + (2t - 4) + (t + 17)
= t + t + t + 2t + t - 4 + 17
= (6 t + 13) cm
(b)
1 m = 100 cm
2.9 m = 290 cm
Total length of thread used if t = 17
= 6 t + 13
= 6(17) + 13
= 102 + 13
= 115 cm
Total length of thread not used
= 290 - 115
= 175 cm
1 cm = 0.01 m
175 cm = 1.75 m
Answer(s): (a) (6t + 13) cm; (b) 1.75 m