Xuan had a ribbon of 300 cm long. She tied some balloons on the ribbon. Part of the ribbon and balloons were shown. Each balloon was 16 cm apart from one another.
- What is the length of the ribbon between the fourth and the twelfth balloon?
- Find the most number of balloons that could be tied on the 300 cm of ribbon with balloons at 16 cm apart from one another.
(a)
Number of intervals between the fourth and the twelfth balloon
= 12 - 4
= 8
Length of the ribbon between the fourth and the twelfth balloon
= 8 x 16
= 128 cm
(b)
Sets of 16 cm
= 300 ÷ 16
= 18 r 12
Most number of balloons
= 18 + 1
= 19
Answer(s): (a) 128 cm; (b) 19