Explain how an enhanced fluid power system improved efficiency in the following scenario. Oliver has designed a new dump truck that is emitting 50 percent less carbon and needs 60 percent less fuel to run. The savings will
allow his construction company to purchase two more vehicles.
HELP !!

Athin walled concentric tube exchanger is used to cool engine oil from 160°c to 60°c with water that is available at 25°c acting as a coolant. the oil and water flow rates are each at 2 kg/s, and the diameter of the inner tube is 0.5 m and the corresponding value of the overall heat transfer coefficient is 250 w/m2. oc. how long must the heat exchanger be to accomplish the desired cooling? cpwater=4.187 kj/kg-candcpengine el=2.035 kj/kg·°c, oil . 120]