Question 369423
The exposed parts of the belt should be 15 in. + 15 in. = 30 inches long.  The parts in contact with the pulleys should be the sum of the half-circumferences of the two pulleys.  That would just give the whole circumference of one of the pulleys, or {{{2*pi*r = 2*pi*2 = 4*pi}}}.  Therefore the total length of the belt should be {{{4pi + 30}}}inches.