Yoko used a total of 10 gold streamers and grey streamers. Each gold streamer was 3 m long. Each grey streamer was 4 m long. The total length of streamers she used was 32 m. How many grey streamers did she use?
If all the streamers are gold,
total length of streamers
= 10 x 4
= 40 m
Difference between the length of 1 gold streamer and 1 grey streamer
= 4 - 3
= 1
Difference between the length of all the gold streamers and all the grey streamers
= 40 - 32
= 8 m
Number of gold streamers
= 8 ÷ 1
= 8
Number of grey streamers
= 10 - 8
= 2
Answer(s): 2
