Question

two lengths of conduits are in the ratios 8:5 respectively. if the first length is 120.0m, what is the second length?

Answer 1

Let length of 3 parts as x,y,z

Given length ratio x/y=7/6 so x=7y/6

and y/z=3/5 so z=5y/3

Given x+y+z=69 introduce x,z value in terms of y

7y/6+y+5y/3=69

7y+6y+10y=69*6

23y=69*6

Y=69*6/23=3*6=18

Answer 2

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