PSLEFabian had 2.9 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 m.
- If m = 24, how much of the string was not used to make the figure? Leave your answer in meters.
(a)
Total length of string used
= m + m + m + (3m - 3) + (m + 11)
= m + m + m + 3m + m - 3 + 11
= (7 m + 8) cm
(b)
1 m = 100 cm
2.9 m = 290 cm
Total length of string used if m = 24
= 7 m + 8
= 7(24) + 8
= 168 + 8
= 176 cm
Total length of string not used
= 290 - 176
= 114 cm
1 cm = 0.01 m
114 cm = 1.14 m
Answer(s): (a) (7m + 8) cm; (b) 1.14 m