PSLEFred had 3.3 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 m.
- If m = 17, how much of the rope was not used to make the figure? Leave your answer in meters.
(a)
Total length of rope used
= m + m + m + (3m - 3) + (m + 12)
= m + m + m + 3m + m - 3 + 12
= (7 m + 9) cm
(b)
1 m = 100 cm
3.3 m = 330 cm
Total length of rope used if m = 17
= 7 m + 9
= 7(17) + 9
= 119 + 9
= 128 cm
Total length of rope not used
= 330 - 128
= 202 cm
1 cm = 0.01 m
202 cm = 2.02 m
Answer(s): (a) (7m + 9) cm; (b) 2.02 m