Question 683325
The worker plus cart is {{{ 160 + 95 = 255 }}}
{{{ 4000 - 255 = 3745 }}}
She can carry, at most, in one trip 
{{{ 3745 / 50 = 74.9 }}} boxes
She can't carry 9/10 of a box, so she can
only move 74 boxes in one trip
--------------------------
{{{ 310 / 74 = 4.19 }}} trips
She can't make 19/100 of a trip, so she'll have to make
one more whole trip.
{{{ 4 + 1 = 5 }}}
She has to make 5 trips
check answer:
In 5 trips, she can move at most {{{ 5*74 = 370 }}}  boxes
In 4 trips, she moves {{{ 4*74 = 296 }}} boxes
After 4 trips, she needs to move {{{ 310 - 296 = 14 }}}
boxes, so she needs the 5th trip for the las 14 boxes