One-fifth 81290

One-fifth of the bridge pillar is embedded in the ground. One-third of its length is in the water, and 1.4 m protrudes above the surface. Determine the length of the bridge pillar.

Correct answer:

x =  3 m

Step-by-step explanation:

5x+3x+1.4=x  x/5+x/3+1.4=x  7x=21  x=721=3  x=3=3 m

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