To recieve their beans from the manufactuer, Tamara and Michael must meet the delivery truck while it's completing its route. The distance from the coffee house to the maufactuer's warehouse where the truck starts its journey is 90km. They know that they can drive 20km/h faster than the delivery truck.
a) If they leave at the same time as the delivery truck, and meet it half an hour later, how far away from the manufacturers warehouse will they meet?
b) Tamara and Michael wish to open their coffee house every morning at 8:30 a.m. If they have to pick up a week's supply of beans (continued)

Question

To recieve their beans from the manufactuer, Tamara and Michael must meet the delivery truck while it's completing its route. The distance from the coffee house to the maufactuer's warehouse where the truck starts its journey is 90km. They know that they can drive 20km/h faster than the delivery truck. 
a) If they leave at the same time as the delivery truck, and meet it half an hour later, how far away from the manufacturers warehouse will they meet?
b) Tamara and Michael wish to open their coffee house every morning at 8:30 a.m. If they have to pick up a week's supply of beans (continued)