Ok so volume is 3 times so you could use paper or a calculator but basically you would have to multiply all of them so 10.4 x 5 x 8 is what you have to do and when you get that your done it is very simple hope it helps
(a) He would drive 96 km in an hour because 1152 divided by 12 is 96
(b) He is technically on schedule because he is driving 104 km per hour, instead of 96, so if he keeps driving at the same rate, he should get there in under 12 hours
