The total length of 5 wires and 9 threads is 312 cm. The length of a thread is
13 of the length of the wire. What is the total length of the 9 threads?
|
Wires |
Threads |
Total |
Number |
5 |
9 |
|
Value |
3 u |
1 u |
|
Total value |
15 u |
9 u |
24 u |
Length of 5 wires and 9 threads
= 15 u + 9 u
= 24 u
24 u = 312
1 u = 312 ÷ 24 = 13
Total length of the 9 threads
= 9 u
= 9 x 13
= 117 cm
Answer(s): 117 cm