a and b together can do a work in 3 days . a alone can do it in 12 days . what time b will take to do the work alone ?
"explanation : a and b 1 day ' s work = 1 / 3 a alone can do 1 day ' s work = 1 / 12 what time b will take to do the work alone ? b = ( a + b ) - a = ( 1 / 3 - ( 1 / 12 ) = 4 days answer : option a"
add(inverse(subtract(divide(const_1, 3), divide(const_1, 12))), divide(const_2, add(const_2, const_3)))