PSLEArchie had 2.9 m of ribbon. He used some of it to make the figure as shown.
- How much of the ribbon did Andy use to make the figure? Leave your answer in the simplest form in terms of p.
- If p = 24, how much of the ribbon was not used to make the figure? Leave your answer in meters.
(a)
Total length of ribbon used
= p + p + p + (3p - 8) + (p + 15)
= p + p + p + 3p + p - 8 + 15
= (7 p + 7) cm
(b)
1 m = 100 cm
2.9 m = 290 cm
Total length of ribbon used if p = 24
= 7 p + 7
= 7(24) + 7
= 168 + 7
= 175 cm
Total length of ribbon not used
= 290 - 175
= 115 cm
1 cm = 0.01 m
115 cm = 1.15 m
Answer(s): (a) (7p + 7) cm; (b) 1.15 m