PSLENeave had 2.3 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 c.
- If c = 12, how much of the rope was not used to make the figure? Leave your answer in meters.
(a)
Total length of rope used
= c + c + c + (2c - 3) + (c + 13)
= c + c + c + 2c + c - 3 + 13
= (6 c + 10) cm
(b)
1 m = 100 cm
2.3 m = 230 cm
Total length of rope used if c = 12
= 6 c + 10
= 6(12) + 10
= 72 + 10
= 82 cm
Total length of rope not used
= 230 - 82
= 148 cm
1 cm = 0.01 m
148 cm = 1.48 m
Answer(s): (a) (6c + 10) cm; (b) 1.48 m