Yoko used a total of 9 blue streamers and gold streamers. Each blue streamer was 2 m long. Each gold streamer was 4 m long. The total length of streamers she used was 28 m. How many gold streamers did she use?
If all the streamers are blue,
total length of streamers
= 9 x 4
= 36 m
Difference between the length of 1 blue streamer and 1 gold streamer
= 4 - 2
= 2
Difference between the length of all the blue streamers and all the gold streamers
= 36 - 28
= 8 m
Number of blue streamers
= 8 ÷ 2
= 4
Number of gold streamers
= 9 - 4
= 5
Answer(s): 5
