PSLEJohn had 3.4 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 = 11, 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 + (2g - 4) + (g + 20)
= g + g + g + 2g + g - 4 + 20
= (6 g + 16) cm
(b)
1 m = 100 cm
3.4 m = 340 cm
Total length of string used if g = 11
= 6 g + 16
= 6(11) + 16
= 66 + 16
= 82 cm
Total length of string not used
= 340 - 82
= 258 cm
1 cm = 0.01 m
258 cm = 2.58 m
Answer(s): (a) (6g + 16) cm; (b) 2.58 m