38 of a rope was used to tie a box. 11 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
= 10 x 2 + 8 x 2 + 7 x 4 + 11
= 75 cm
(b)
Original length of the rope = 8 u
Length used to tie the box = 3 u
3 u = 75 cm
1 u = 75 ÷ 3 = 25
Original length of the rope
= 8 u
= 25 x 8
= 200 cm
Answer(s): (a) 75 cm; (b) 200 cm