Jen had a ribbon of 150 cm long. She tied some balloons on the ribbon. Part of the ribbon and balloons were shown. Each balloon was 20 cm apart from one another.
- What is the length of the ribbon between the fifth and the tenth balloon?
- Find the most number of balloons that could be tied on the 150 cm of ribbon with balloons at 20 cm apart from one another.
(a)
Number of intervals between the fifth and the tenth balloon
= 10 - 5
= 5
Length of the ribbon between the fifth and the tenth balloon
= 5 x 20
= 100 cm
(b)
Sets of 20 cm
= 150 ÷ 20
= 7 r 10
Most number of balloons
= 7 + 1
= 8
Answer(s): (a) 100 cm; (b) 8