27 of a ribbon was used to tie a box. 8 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
= 10 x 2 + 7 x 2 + 5 x 4 + 8
= 62 cm
(b)
Original length of the ribbon = 7 u
Length used to tie the box = 2 u
2 u = 62 cm
1 u = 62 ÷ 2 = 31
Original length of the ribbon
= 7 u
= 31 x 7
= 217 cm
Answer(s): (a) 62 cm; (b) 217 cm