A planter shaped a rectangular prism has a length of 4 meters, a width of 4 meters, and a height of 3 letters. attached to the side of the planter is a smaller planter with 1/2 the volume of the larger planter. what is the combine volume of both planter

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. how many hours after the truck's departure will the two meet?