PSLEVaidev had 2.8 m of rope. He used some of it to make the figure as shown.
- How much of the rope did Andy use to make the figure? Leave your answer in the simplest form in terms of v.
- If v = 15, how much of the rope was not used to make the figure? Leave your answer in meters.
(a)
Total length of rope used
= v + v + v + (3v - 4) + (v + 13)
= v + v + v + 3v + v - 4 + 13
= (7 v + 9) cm
(b)
1 m = 100 cm
2.8 m = 280 cm
Total length of rope used if v = 15
= 7 v + 9
= 7(15) + 9
= 105 + 9
= 114 cm
Total length of rope not used
= 280 - 114
= 166 cm
1 cm = 0.01 m
166 cm = 1.66 m
Answer(s): (a) (7v + 9) cm; (b) 1.66 m