The total length of 4 ropes and 9 threads is 261 cm. The length of a thread is
15 of the length of the rope. What is the total length of the 9 threads?
|
Ropes |
Threads |
Total |
Number |
4 |
9 |
|
Value |
5 u |
1 u |
|
Total value |
20 u |
9 u |
29 u |
Length of 4 ropes and 9 threads
= 20 u + 9 u
= 29 u
29 u = 261
1 u = 261 ÷ 29 = 9
Total length of the 9 threads
= 9 u
= 9 x 9
= 81 cm
Answer(s): 81 cm