29 of a rope was used to tie a box. 10 cm was used for the rope knot.
- Find the length of the rope used.
- What was the original length of the rope?
(a)
Length of the rope used
= 11 x 2 + 10 x 2 + 8 x 4 + 10
= 84 cm
(b)
Original length of the rope = 9 u
Length used to tie the box = 2 u
2 u = 84 cm
1 u = 84 ÷ 2 = 42
Original length of the rope
= 9 u
= 42 x 9
= 378 cm
Answer(s): (a) 84 cm; (b) 378 cm