Hard Truck (Page 1) - News - Neworder Forums: "A truck driver is delivering a shipment of windows vista cds from microsoft to the local landfill. On the way to the landfill the truck driver is so happy to drive this load, he decides to drive slowly and enjoy every second of it; so on the way there he does 50 km/h.
At what speed should he drive back to microsoft (and collect his next batch of CDs) so that the AVERAGE speed of this the whole trip (to the landfill and back) will be 100 km/h?
i.e. if i drive at 50km/h from A to B, at what speed should i drive back so that the average speed of the entire trip A->B->A will be 100km/h?
Try to solve this without doing the actual math."
