Jeremy needed exactly 77 m of cloth to make 21 small identical streamers and 7 big identical streamers. He had some cloth which was just enough to make all the small streamers and 5 big streamers. He used 125
12 cm for each small streamer.
- How much cloth would he need to make 1 big streamer?
- How much cloth was he short of to make the remaining big streamers?
(a)
Length of 21 small streamers + Length of 7 big streamers = 77 m
1 m = 100 cm
Length of cloth for each small streamer
= 125
12 cm
= 125.5 cm
= 1.255 m
Length of cloth for 21 small streamers
= 21 x 1.255
= 26.355 m
Length of cloth for 7 big streamers
= 77 - 26.355
= 50.645 m
Length of cloth to make 1 big streamer
= 50.645 ÷ 7
= 7.235 m
(b)
Number of remaining big streamers that Jeremy needed
= 7 - 5
= 2
Length of cloth that he was short of
= Length of 2 big streamers
= 2 x 7.235
= 14.47 m
Answer(s): (a) 7.235 m; (b) 14.47 m