According to the conditions, we can know that the sum of the speed of the bus and the truck is 285 divided by 3, and the speed of the bus is 1.5 times that of the truck, so we can regard the speed of the truck as one, so the speed of the bus is 1.5, and 1 .5 is 95, that is, 95 divided by 65435. Divide 95 by 2.5 to get 38, then the speed of the truck is 38, and the speed of the bus is 38 times 1.5 equals 57! Check it, it should be right!