A * B means A and B are of the same age; A - B means B is younger than A; A + B means A is younger than B;
For an expression Farha - Farida - Arif, which of the following cannot be correct under any circumstances ?
A can complete a journey in 19 hours. He travels first half of the journey at the rate of 21 km/hr and second half at the rate of 24 km/hr. Find the total journey in km.