29 of a streamer was used to tie a box. 20 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
= 10 x 2 + 9 x 2 + 8 x 4 + 20
= 90 cm
(b)
Original length of the streamer = 9 u
Length used to tie the box = 2 u
2 u = 90 cm
1 u = 90 ÷ 2 = 45
Original length of the streamer
= 9 u
= 45 x 9
= 405 cm
Answer(s): (a) 90 cm; (b) 405 cm