PSLEIvory had two streamers of the same length. She cut the first streamer into equal parts of length 70 cm and to each part she tied 3 gold balloons. After that, she cut the second streamer into equal parts of length 80 cm and to each part she tied 4 white balloons. When she finished tying, she counted that there were 8 more white balloons than gold balloons. How many balloons were there altogether?
|
First streamer |
Second streamer |
Difference |
Total |
Length of each part |
70 cm |
80 cm |
|
|
Number of balloons tied to each part |
3 gold balloons |
4 white balloons |
|
|
LCM |
560 cm |
560 cm |
|
|
Number of equal parts |
560 ÷ 70 = 8 |
560 ÷ 80 = 7 |
|
|
Number of balloons for each streamer per set |
8 x 3 = 24 |
4 x 7 = 28 |
28 - 24 = 4 |
24 + 28 = 52 |
LCM of 70 and 80 = 560
Number of sets of 3 gold balloons in a length of 560 cm
= 560 ÷ 70
= 8
Number of gold balloons in a length of 560 cm
= 8 x 3
= 24
Number of sets of 4 white balloons in a length of 560 cm
= 560 ÷ 80
= 7
Number of white balloons in a length of 560 cm
= 7 x 4
= 28
Extra number of white balloons in a length of 560 cm
= 28 - 24
= 4
Number of sets of balloons
= 8 ÷ 4
= 2
Total number of balloons in one set of 560 cm of gold balloons and one set of 560 cm of white balloons
= 24 + 28
= 52
Total number of balloons of the two streamers
= 2 x 52
= 104
Answer(s): 104