Emma used
311 of the wire to tie some presents. She threw away
411 of the remaining wire. As a result, she had 728 cm of the wire left. How much wire did Emma have at first? Give your answer in cm.
Fraction of the wire left after tying some presents
= 1 -
311=
811 Fraction of the remaining wire left after throwing away
= 1 -
411=
711
Fraction of the total wire left
=
811 ×
711=
56121
Length of the wire at first = 121 u
Length of the wire left = 56 u
56 u = 728
1 u = 728 ÷ 56 = 13
Length of the wire at first
= 121 u
= 121 x 13
= 1573 cm
Answer(s): 1573 cm