a can complete a work in 10 days and b can do the same work in 5 days . if a after doing 2 days , leaves the work , find in how many days b will do the remaining work ?
"the required answer = ( 10 - 2 ) * 5 / 10 = 40 / 10 = 4 days answer is b"
add(multiply(10, 2), divide(10, 2))