PSLEElijah 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 y.
- If y = 13, how much of the ribbon was not used to make the figure? Leave your answer in meters.
(a)
Total length of ribbon used
= y + y + y + (2y - 5) + (y + 14)
= y + y + y + 2y + y - 5 + 14
= (6 y + 9) cm
(b)
1 m = 100 cm
2.9 m = 290 cm
Total length of ribbon used if y = 13
= 6 y + 9
= 6(13) + 9
= 78 + 9
= 87 cm
Total length of ribbon not used
= 290 - 87
= 203 cm
1 cm = 0.01 m
203 cm = 2.03 m
Answer(s): (a) (6y + 9) cm; (b) 2.03 m