PSLEAsher had 2.9 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 f.
- If f = 12, how much of the rope was not used to make the figure? Leave your answer in meters.
(a)
Total length of rope used
= f + f + f + (2f - 6) + (f + 18)
= f + f + f + 2f + f - 6 + 18
= (6 f + 12) cm
(b)
1 m = 100 cm
2.9 m = 290 cm
Total length of rope used if f = 12
= 6 f + 12
= 6(12) + 12
= 72 + 12
= 84 cm
Total length of rope not used
= 290 - 84
= 206 cm
1 cm = 0.01 m
206 cm = 2.06 m
Answer(s): (a) (6f + 12) cm; (b) 2.06 m