Jade used
311 of the rope to tie some presents. She threw away
34 of the remaining rope. As a result, she had 20 cm of the rope left. How much rope did Jade have at first? Give your answer in cm.
Fraction of the rope left after tying some presents
= 1 -
311=
811 Fraction of the remaining rope left after throwing away
= 1 -
34=
14
Fraction of the total rope left
=
811 ×
14=
211
Length of the rope at first = 11 u
Length of the rope left = 2 u
2 u = 20
1 u = 20 ÷ 2 = 10
Length of the rope at first
= 11 u
= 11 x 10
= 110 cm
Answer(s): 110 cm