PSLERyan had 3.3 m of string. He used some of it to make the figure as shown.
- How much of the string 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 string was not used to make the figure? Leave your answer in meters.
(a)
Total length of string used
= g + g + g + (3g - 7) + (g + 16)
= g + g + g + 3g + g - 7 + 16
= (7 g + 9) cm
(b)
1 m = 100 cm
3.3 m = 330 cm
Total length of string used if g = 30
= 7 g + 9
= 7(30) + 9
= 210 + 9
= 219 cm
Total length of string not used
= 330 - 219
= 111 cm
1 cm = 0.01 m
111 cm = 1.11 m
Answer(s): (a) (7g + 9) cm; (b) 1.11 m