Adam has a ribbon which is 220 cm long.
He cuts the ribbon into 3 pieces.
The first piece is 5 times as long as the second piece.
The third piece is 160 cm long.
- Find the total length of the first and third pieces.
- Find the difference in length between the second and the third piece.
(a)
Focus on the sentence with the word '
times'.
Assign 1 u to the variable that is found after the word '
times'.
Length of second piece = 1 u
Length of first piece = 5 u
Length of third piece = 160 cm
Length of the second and the third pieces
= 220 - 160
= 60 cm
5 u + 1 u = 60
6 u = 60
1 u = 60 ÷ 6 = 10
Total length of the first and third pieces
= 5 u + 160
= 5 x 10 + 160
= 50 + 160
= 210 cm
(b)
Difference in length between the second and the third piece
= 160 - 10
= 150 cm
Answer(s): (a) 210 cm; (b) 150 cm