Question 441244
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Hi
Painter B works twice as fast as A.
Let x and 2x represent time(in hours)it takes solo for B and A
Question states***Per hour the equalizer
 1/x + 1/2x = 1/10  |Multiplying thru by 10x so as all denominators = 1
  10 + 5 = x
     x = 15hr, time solo for B.  time solo for A is 30hr

CHECKING our Answer***
 1/15 + 1/30 = 2/30 + 1/30 = 3/30 = 1/10