23 of a thread was used to tie a box. 8 cm was used for the thread knot.
- Find the length of the thread used.
- What was the original length of the thread?
(a)
Length of the thread used
= 10 x 2 + 8 x 2 + 7 x 4 + 8
= 72 cm
(b)
Original length of the thread = 3 u
Length used to tie the box = 2 u
2 u = 72 cm
1 u = 72 ÷ 2 = 36
Original length of the thread
= 3 u
= 36 x 3
= 108 cm
Answer(s): (a) 72 cm; (b) 108 cm