The length of copper pipe P is
34 of the length of copper pipe S and the length of copper pipe S is
15 of the length of copper pipe Q and
16 of the length of copper pipe R. What fraction of the total length of the 4 copper pipes is copper pipe R?
P |
S |
Q |
R |
Total |
3x1 |
4x1 |
|
|
|
|
1x4 |
5x4 |
|
|
|
1x4 |
|
6x4 |
|
3 u |
4 u |
20 u |
24 u |
51 u |
The length of copper pipe S is repeated. Make the length of copper pipe S the same. LCM of 4 and 1 is 4.
Total length of all the 4 copper pipes
= 3 u + 4 u + 20 u + 24 u
= 51 u
Copper Pipe RTotal Length =
2451 =
817Answer(s):
817