Eva used
16 of the rope to tie some presents. She threw away
311 of the remaining rope. As a result, she had 400 cm of the rope left. How much rope did Eva have at first? Give your answer in cm.
Fraction of the rope left after tying some presents
= 1 -
16=
56 Fraction of the remaining rope left after throwing away
= 1 -
311=
811
Fraction of the total rope left
=
56 ×
811=
2033
Length of the rope at first = 33 u
Length of the rope left = 20 u
20 u = 400
1 u = 400 ÷ 20 = 20
Length of the rope at first
= 33 u
= 33 x 20
= 660 cm
Answer(s): 660 cm