25 of a thread was used to tie a box. 12 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
= 12 x 2 + 11 x 2 + 10 x 4 + 12
= 98 cm
(b)
Original length of the thread = 5 u
Length used to tie the box = 2 u
2 u = 98 cm
1 u = 98 ÷ 2 = 49
Original length of the thread
= 5 u
= 49 x 5
= 245 cm
Answer(s): (a) 98 cm; (b) 245 cm