Question 777791
{{{1/5 + 1/3 = 1/t}}}


{{{3/15 + 5/15 = 1/t}}}


{{{8/15 = 1/t}}}


{{{8t = 15*1}}}


{{{8t = 15}}}


{{{t = 15/8}}}


Answer: {{{15/8}}} hours (that's equivalent to {{{1&7/8}}} hours or 1.875 hours)