a can do a work in 8 days . b can do the same work in 16 days . if both a & b are working together in how many days they will finish the work ?
"a rate = 1 / 8 b rate = 1 / 16 ( a + b ) rate = ( 1 / 8 ) + ( 1 / 16 ) = 3 / 16 a & b finish the work in 16 / 3 days correct option is b"
divide(multiply(8, 16), add(8, 16))