Elyse had a ribbon of 170 cm long. She tied some balloons on the ribbon. Part of the ribbon and balloons were shown. Each balloon was 18 cm apart from one another.
- What is the length of the ribbon between the fourth and the eleventh balloon?
- Find the most number of balloons that could be tied on the 170 cm of ribbon with balloons at 18 cm apart from one another.
(a)
Number of intervals between the fourth and the eleventh balloon
= 11 - 4
= 7
Length of the ribbon between the fourth and the eleventh balloon
= 7 x 18
= 126 cm
(b)
Sets of 18 cm
= 170 ÷ 18
= 9 r 8
Most number of balloons
= 9 + 1
= 10
Answer(s): (a) 126 cm; (b) 10