Yen 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 second and the seventh 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 second and the seventh balloon
= 7 - 2
= 5
Length of the ribbon between the second and the seventh balloon
= 5 x 15
= 75 cm
(b)
Sets of 15 cm
= 170 ÷ 15
= 11 r 5
Most number of balloons
= 11 + 1
= 12
Answer(s): (a) 75 cm; (b) 12