25 of a streamer was used to tie a box. 12 cm was used for the streamer knot.
- Find the length of the streamer used.
- What was the original length of the streamer?
(a)
Length of the streamer used
= 12 x 2 + 9 x 2 + 8 x 4 + 12
= 86 cm
(b)
Original length of the streamer = 5 u
Length used to tie the box = 2 u
2 u = 86 cm
1 u = 86 ÷ 2 = 43
Original length of the streamer
= 5 u
= 43 x 5
= 215 cm
Answer(s): (a) 86 cm; (b) 215 cm