a can do a work in 14 days and working together a and b can do the same work in 10 days . in what time can b alone do the work ?
work done by b in 1 day = 1 / 10 - 1 / 14 = ( 7 - 5 ) / 70 = 1 / 35 so , b alone can do the work in 35 days . answer : d
divide(const_1, subtract(divide(const_1, 10), divide(const_1, 14)))