35 of a wire was used to tie a box. 8 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 + 9 x 2 + 8 x 4 + 8
= 78 cm
(b)
Original length of the wire = 5 u
Length used to tie the box = 3 u
3 u = 78 cm
1 u = 78 ÷ 3 = 26
Original length of the wire
= 5 u
= 26 x 5
= 130 cm
Answer(s): (a) 78 cm; (b) 130 cm