The total length of 7 wires and 7 threads is 385 cm. The length of a thread is
23 of the length of the wire. What is the total length of the 7 threads?
|
Wires |
Threads |
Total |
Number |
7 |
7 |
|
Value |
3 u |
2 u |
|
Total value |
21 u |
14 u |
35 u |
Length of 7 wires and 7 threads
= 21 u + 14 u
= 35 u
35 u = 385
1 u = 385 ÷ 35 = 11
Total length of the 7 threads
= 14 u
= 14 x 11
= 154 cm
Answer(s): 154 cm