Jean used
310 of the wire to tie some presents. She threw away
611 of the remaining wire. As a result, she had 140 cm of the wire left. How much wire did Jean have at first? Give your answer in cm.
Fraction of the wire left after tying some presents
= 1 -
310=
710 Fraction of the remaining wire left after throwing away
= 1 -
611=
511
Fraction of the total wire left
=
710 ×
511=
722
Length of the wire at first = 22 u
Length of the wire left = 7 u
7 u = 140
1 u = 140 ÷ 7 = 20
Length of the wire at first
= 22 u
= 22 x 20
= 440 cm
Answer(s): 440 cm