Hazel had a ribbon of 180 cm long. She tied some balloons on the ribbon. Part of the ribbon and balloons were shown. Each balloon was 13 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 180 cm of ribbon with balloons at 13 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 13
= 91 cm
(b)
Sets of 13 cm
= 180 ÷ 13
= 13 r 11
Most number of balloons
= 13 + 1
= 14
Answer(s): (a) 91 cm; (b) 14