37 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
= 10 x 2 + 8 x 2 + 7 x 4 + 20
= 84 cm
(b)
Original length of the wire = 7 u
Length used to tie the box = 3 u
3 u = 84 cm
1 u = 84 ÷ 3 = 28
Original length of the wire
= 7 u
= 28 x 7
= 196 cm
Answer(s): (a) 84 cm; (b) 196 cm