PSLEGabriel had 2.8 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 v.
- If v = 17, how much of the ribbon was not used to make the figure? Leave your answer in meters.
(a)
Total length of ribbon used
= v + v + v + (3v - 8) + (v + 19)
= v + v + v + 3v + v - 8 + 19
= (7 v + 11) cm
(b)
1 m = 100 cm
2.8 m = 280 cm
Total length of ribbon used if v = 17
= 7 v + 11
= 7(17) + 11
= 119 + 11
= 130 cm
Total length of ribbon not used
= 280 - 130
= 150 cm
1 cm = 0.01 m
150 cm = 1.5 m
Answer(s): (a) (7v + 11) cm; (b) 1.5 m