Fernando built a robot to filter air and water efficiently. he expects the robot to filter more that 512 liters of air and waterwheel using less than 9 joules of energy

The amount used= 13.04- 1.9 = 11.14

At a constant it will take one hour to travel 32 mi.at that speed it will take 1/2 hr to travel the remaining 16 mi.it will take 1+1/2 hr to travel the 48mi @ 32mph.so 1 hr = 60 min& 1/2 hr = 30 min1+1/2 hr = 90 min.there are 60s in each 90 × 60 = 3600 seconds.the real question seriously is he why are they driving so slow? ! lol.