PSLEPierre had 3.4 m of ribbon. He used some of it to make the figure as shown.
- How much of the ribbon did Andy use to make the figure? Leave your answer in the simplest form in terms of d.
- If d = 24, how much of the ribbon was not used to make the figure? Leave your answer in meters.
(a)
Total length of ribbon used
= d + d + d + (2d - 6) + (d + 18)
= d + d + d + 2d + d - 6 + 18
= (6 d + 12) cm
(b)
1 m = 100 cm
3.4 m = 340 cm
Total length of ribbon used if d = 24
= 6 d + 12
= 6(24) + 12
= 144 + 12
= 156 cm
Total length of ribbon not used
= 340 - 156
= 184 cm
1 cm = 0.01 m
184 cm = 1.84 m
Answer(s): (a) (6d + 12) cm; (b) 1.84 m