The total length of 6 threads and 3 ribbons is 312 cm. The length of a ribbon is
23 of the length of the thread. What is the total length of the 3 ribbons?
|
Threads |
Ribbons |
Total |
Number |
6 |
3 |
|
Value |
3 u |
2 u |
|
Total value |
18 u |
6 u |
24 u |
Length of 6 threads and 3 ribbons
= 18 u + 6 u
= 24 u
24 u = 312
1 u = 312 ÷ 24 = 13
Total length of the 3 ribbons
= 6 u
= 6 x 13
= 78 cm
Answer(s): 78 cm