37 of a thread was used to tie a box. 9 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 + 9 x 2 + 7 x 4 + 9
= 75 cm
(b)
Original length of the thread = 7 u
Length used to tie the box = 3 u
3 u = 75 cm
1 u = 75 ÷ 3 = 25
Original length of the thread
= 7 u
= 25 x 7
= 175 cm
Answer(s): (a) 75 cm; (b) 175 cm