29 of a ribbon was used to tie a box. 16 cm was used for the ribbon knot.
- Find the length of the ribbon used.
- What was the original length of the ribbon?
(a)
Length of the ribbon used
= 11 x 2 + 10 x 2 + 9 x 4 + 16
= 94 cm
(b)
Original length of the ribbon = 9 u
Length used to tie the box = 2 u
2 u = 94 cm
1 u = 94 ÷ 2 = 47
Original length of the ribbon
= 9 u
= 47 x 9
= 423 cm
Answer(s): (a) 94 cm; (b) 423 cm