When moving from point 'A' to 'B' with a speed 20% more than its usual speed a bike takes 160 minutes less than the usual however, when the bike travel 10 km/hr faster than its usual speed then it saves 240 minutes as compared to usual time if the distance between point 'C' and 'D' is 96 km more than the distance between points 'A' and 'B' then what should be the speed of bike so that it takes 720 minutes hours to go from point 'C' to point 'D'?