Diana 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 15 cm apart from one another.
- What is the length of the ribbon between the third and the tenth balloon?
- Find the most number of balloons that could be tied on the 170 cm of ribbon with balloons at 15 cm apart from one another.
(a)
Number of intervals between the third and the tenth balloon
= 10 - 3
= 7
Length of the ribbon between the third and the tenth balloon
= 7 x 15
= 105 cm
(b)
Sets of 15 cm
= 170 ÷ 15
= 11 r 5
Most number of balloons
= 11 + 1
= 12
Answer(s): (a) 105 cm; (b) 12