Alright, lets get started.
Sophie has 5 pieces of string that are 4 yards each.
1 yards = 3 feet,
So, 4 yards = [tex] 4 * 3 =12 [/tex] feet
Total number of string she has = 5 piece
So, total length she has = [tex] 5*12 = 60 [/tex] feet
It means she had 60 feet string in starting.
Now, She uses 3 pieces that are each 3 feet long, means
She uses = [tex] 3*3 = 9 [/tex] feet
So, remaining string length will be = [tex] 60 - 9 = 51 [/tex] feet
Means 51 feet string does Sophie have. : Answer
Hope it will help :)
