Fiona had a ribbon of 220 cm long. She tied some balloons on the ribbon. Part of the ribbon and balloons were shown. Each balloon was 12 cm apart from one another.
- What is the length of the ribbon between the second and the ninth balloon?
- Find the most number of balloons that could be tied on the 220 cm of ribbon with balloons at 12 cm apart from one another.
(a)
Number of intervals between the second and the ninth balloon
= 9 - 2
= 7
Length of the ribbon between the second and the ninth balloon
= 7 x 12
= 84 cm
(b)
Sets of 12 cm
= 220 ÷ 12
= 18 r 4
Most number of balloons
= 18 + 1
= 19
Answer(s): (a) 84 cm; (b) 19