25 of a wire was used to tie a box. 20 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
= 11 x 2 + 10 x 2 + 9 x 4 + 20
= 98 cm
(b)
Original length of the wire = 5 u
Length used to tie the box = 2 u
2 u = 98 cm
1 u = 98 ÷ 2 = 49
Original length of the wire
= 5 u
= 49 x 5
= 245 cm
Answer(s): (a) 98 cm; (b) 245 cm