PSLEArchie had 3.2 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 g.
- If g = 30, how much of the ribbon was not used to make the figure? Leave your answer in meters.
(a)
Total length of ribbon used
= g + g + g + (2g - 8) + (g + 11)
= g + g + g + 2g + g - 8 + 11
= (6 g + 3) cm
(b)
1 m = 100 cm
3.2 m = 320 cm
Total length of ribbon used if g = 30
= 6 g + 3
= 6(30) + 3
= 180 + 3
= 183 cm
Total length of ribbon not used
= 320 - 183
= 137 cm
1 cm = 0.01 m
137 cm = 1.37 m
Answer(s): (a) (6g + 3) cm; (b) 1.37 m