Answers

2014-08-12T13:26:09+08:00
The equation is
  C = 1+ kt                C  = total charge        k =  rate per hr    &  t = time taken
so after  1 hr the charge       C = 1 + 1/3 . 1 =  $1 1/3
after  3 hr                              C = 1+ 1/3 . 3  = $ 2    and so on
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