Painters

First painter painted fence himself for 4 hours, the second painter 1.2 hours sooner than first, and the third painters slowest up to 16 hours.

How long took them paint fence if worked together?

Correct result:

x =  1.493 h

Solution:


x • (1/4+1/(4-1.2)+1/16) = 1

10.714286x = 16

x = 11275 ≈ 1.493333

Calculated by our simple equation calculator.



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