PSLEHarry had 3.8 m of streamer. He used some of it to make the figure as shown.
- How much of the streamer did Andy use to make the figure? Leave your answer in the simplest form in terms of g.
- If g = 20, how much of the streamer was not used to make the figure? Leave your answer in meters.
(a)
Total length of streamer used
= g + g + g + (2g - 10) + (g + 12)
= g + g + g + 2g + g - 10 + 12
= (6 g + 2) cm
(b)
1 m = 100 cm
3.8 m = 380 cm
Total length of streamer used if g = 20
= 6 g + 2
= 6(20) + 2
= 120 + 2
= 122 cm
Total length of streamer not used
= 380 - 122
= 258 cm
1 cm = 0.01 m
258 cm = 2.58 m
Answer(s): (a) (6g + 2) cm; (b) 2.58 m