PSLECody had 3.5 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 g.
- If g = 11, how much of the rope was not used to make the figure? Leave your answer in meters.
(a)
Total length of rope used
= g + g + g + (2g - 10) + (g + 14)
= g + g + g + 2g + g - 10 + 14
= (6 g + 4) cm
(b)
1 m = 100 cm
3.5 m = 350 cm
Total length of rope used if g = 11
= 6 g + 4
= 6(11) + 4
= 66 + 4
= 70 cm
Total length of rope not used
= 350 - 70
= 280 cm
1 cm = 0.01 m
280 cm = 2.8 m
Answer(s): (a) (6g + 4) cm; (b) 2.8 m