Question 899328
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Hi
{{{1/30 + 1/30 = 1/x}}}|Multiplying thru by 30x so as all denominators = 1
   x + x = 30
    2x = 30
     x = 15min
{{{1/2 + 1/1 = 1/x }}}  |Multiplying thru by x so as all denominators = 1
   x + x = 1
   2x = 1
   x = .5 hr Or 30min