The total length of 7 strings and 6 ribbons is 351 cm. The length of a ribbon is
13 of the length of the string. What is the total length of the 6 ribbons?
|
Strings |
Ribbons |
Total |
Number |
7 |
6 |
|
Value |
3 u |
1 u |
|
Total value |
21 u |
6 u |
27 u |
Length of 7 strings and 6 ribbons
= 21 u + 6 u
= 27 u
27 u = 351
1 u = 351 ÷ 27 = 13
Total length of the 6 ribbons
= 6 u
= 6 x 13
= 78 cm
Answer(s): 78 cm