27 of a rope was used to tie a box. 20 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
= 12 x 2 + 10 x 2 + 8 x 4 + 20
= 96 cm
(b)
Original length of the rope = 7 u
Length used to tie the box = 2 u
2 u = 96 cm
1 u = 96 ÷ 2 = 48
Original length of the rope
= 7 u
= 48 x 7
= 336 cm
Answer(s): (a) 96 cm; (b) 336 cm