37 of a wire was used to tie a box. 18 cm was used for the wire knot.
- Find the length of the wire used.
- What was the original length of the wire?
(a)
Length of the wire used
= 10 x 2 + 7 x 2 + 5 x 4 + 18
= 72 cm
(b)
Original length of the wire = 7 u
Length used to tie the box = 3 u
3 u = 72 cm
1 u = 72 ÷ 3 = 24
Original length of the wire
= 7 u
= 24 x 7
= 168 cm
Answer(s): (a) 72 cm; (b) 168 cm