Question

riding in a car at constant velocity and see an open manhole. I take out an watermelon and hold it out window. My speed is 10m/s and the initial height of watermelon or any fruit is 1 m. I need to do a calculation to be able to know how far ahead of manhole I have to drop watermelon so it goes into the hole. I need to show calculations and resulting lead distance for successfully getting the fruit into the hole.-
Where do I start?