Jade had a ribbon of 160 cm long. She tied some balloons on the ribbon. Part of the ribbon and balloons were shown. Each balloon was 15 cm apart from one another.
- What is the length of the ribbon between the fourth and the thirteenth balloon?
- Find the most number of balloons that could be tied on the 160 cm of ribbon with balloons at 15 cm apart from one another.
(a)
Number of intervals between the fourth and the thirteenth balloon
= 13 - 4
= 9
Length of the ribbon between the fourth and the thirteenth balloon
= 9 x 15
= 135 cm
(b)
Sets of 15 cm
= 160 ÷ 15
= 10 r 10
Most number of balloons
= 10 + 1
= 11
Answer(s): (a) 135 cm; (b) 11