PSLERael had 3.8 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 h.
- If h = 22, how much of the string was not used to make the figure? Leave your answer in meters.
(a)
Total length of string used
= h + h + h + (2h - 7) + (h + 13)
= h + h + h + 2h + h - 7 + 13
= (6 h + 6) cm
(b)
1 m = 100 cm
3.8 m = 380 cm
Total length of string used if h = 22
= 6 h + 6
= 6(22) + 6
= 132 + 6
= 138 cm
Total length of string not used
= 380 - 138
= 242 cm
1 cm = 0.01 m
242 cm = 2.42 m
Answer(s): (a) (6h + 6) cm; (b) 2.42 m