PSLEWill had 3.9 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 m.
- If m = 22, 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 - 8) + (m + 15)
= m + m + m + 3m + m - 8 + 15
= (7 m + 7) cm
(b)
1 m = 100 cm
3.9 m = 390 cm
Total length of rope used if m = 22
= 7 m + 7
= 7(22) + 7
= 154 + 7
= 161 cm
Total length of rope not used
= 390 - 161
= 229 cm
1 cm = 0.01 m
229 cm = 2.29 m
Answer(s): (a) (7m + 7) cm; (b) 2.29 m